Brussels National

IATA/ICAO CODE: BRU/EBBR
CITY: Brussels
COUNTRY: Belgium

AIRPORT CONTACT

Information updated by the airport 10/2007
Verify information below with the airport
Name: Dirk Geukens Elisabeth Peeters
Title: Director of Operations Manager Noise Issues
Airport: Brussels International Brussels Airport Company
Address:


Zaventem
B-1930
Belgium
Zaventem
B-1930
Belgium
Phone: +32 2 753 6801 +32 2 753 6201
Fax: +32 2 753 6810 +32 2 753 6210
Email:   liesbeth.peeters@brusselsairport.be
Airport Web Site: www.brusselsairport.be

ELEVATION: 180 ft.
RUNWAY INFORMATION
Orientation
Length (m)
Displaced
Threshold (m)
Glide Slope(deg)
Width (m)
07L/25R
3638
-
-
45
07R/25L
3211
-
-
45
02/20
2987
-
-
50

NOISE ABATEMENT PROCEDURES
For details , see AIP Belgium EBBR AD 2.21- European AIS Database
Note: There are special noise abatement procedures for arrivals during the nighttime hours (2200-0459).

AIRPORT CURFEWS - See OPERATING QUOTA below

PREFERENTIAL RUNWAYS

The Preferential Runway System is established as follows:

 
Day
Night
0500 to
1559
1600 to
2159
2200 to
0159
0200 to
0459
MON 0500
till TUE
0459
Take-off
25R
20
07R / 07L (*)
Landing
25R / 25L
25L / 25R
20
TUE 0500
till WED
0459
Take-off
25R
25R / 20
Landing
25R / 25L
25R / 25L
WED 0500
till THU
0459
Take-off
25R
25R
07R / 07L (*)
Landing
25R / 25L
25R / 25L
20
THU 0500
till FRI
0459
Take-off
25R
25R / 20
Landing
25R / 25L
25R / 25L
FRI 0500
till SAT
0459
Take-off
25R
20
07R / 07L (*)
Landing
25R / 25L
25R / 25L
20
SAT 0500
till SUN
0459
Take-off
25R
25L
Landing
25R / 25L
25R
SUN 0500
till MON 0459
Take-off
20
25R
25R / 20
Landing
25R / 25L
25R / 25L
(*) 07L to NIK / 07R to CIV, LNO, SPI, SOPOK, PITES and ROUSY. 07L

a) The Preferential Runway System is not the determining factor in runway selection under the following circumstances:

- For RWYs 25R, 25L, 07L and 07R: when RWY s are dry or wet and the cross and/or tail wind component exceed(s) respectively 20 kt and 7 kt (gusts included).

- For RWY s 20 and 02 for landing aircraft : when RWYs are dry or wet and the cross and/or tail wind component exceed(s) respectively 15 kt and 5 kt (gusts included).

- For RWYs 20 and 02 for departing aircraft from 2200 to 0459: when RWYs are dry or wet and the cross and/or tail wind component exceed(s) respectively 15 kt and 5 kt (gusts included).

- For RWYs 20 and 02 for departing aircraft from 0500 to 2159: when RWYs are dry or wet and the cross and / or tail wind component exceed(s) respectively 15 kt and 0 kt (gusts included).

- When RWYs are contaminated or when the braking action is less than good.

- During low visibility operations.
- When alternative RWYs are successively requested by pilots for safety reasons.

- When wind shear has been reported or forecast or when thunderstorms are expected to affect the approach or DEP.

b) When the components exceed the values stated above, a RWY more nearly into wind will be assigned. However, neither RWYs 07L and 07R shall be used for Landing , except when no other suitable RWY is AVBL.

c) In order to expedite DEP TFC when RWY 02 is in use, DEP from RWY07R is compulsory either from position "H" ( TORA 2 891), line-up position 1 ( TORA 2 624) or line-up position 2 ( TORA 2 341) to be intercalated between ARR on RWY 02.

d) In headwind configurations, the cross wind component is not a limiting factor for Take-off which are conducted on pilot's responsibility and ATC discretion.

e) Times of RWYs changeover are subject to flexibility in order to ensure transition in safe conditions. ATC will operate the changeover as close as possible from the indicated time taken into account TFC conditions.

OPERATING QUOTA

Noise Quota System During the Night and the Early Morning

a) Take-off and Landing with QC > 12 is forbidden between 2200 and 0459.

b) Take-off and Landing with QC > 24 is forbidden between 0500 and 0559.

c) Are excluded from this prohibition:

- Take-off and Landing performed by aircraft carrying members of the Belgian Royal Family, the Belgian Government, the Regional and Community Governments, Foreign Royal Families, Heads of State or leaders of foreign governments, presidents and commissioners of the European Union, on official missions

- Take-off and Landing performed with regard to missions in case of disasters or for the purpose of medical assistance

- Take-off and Landing concerning MIL missions

- Take-off and Landing, performed in exceptional conditions such as:

-flights on which there is an immediate danger to the life or health of persons as well as animals

-flights diverted for MET reasons.

d) Owing to extraordinary circumstances beyond its control, an operator may be exceptionally allowed to operate a non-compliant aircraft on the condition that it is duly justified to the Director General of the CAA within two working days following the operation.

Mail:
Civil Aviation Authority
CCN
Rue du Progrès / Vooruitgangstraat, 80/5
B-1030 Brussels
BELGIUM
Tel:++32 (0)2 206 32 11
Fax:++32 (0)2 203 15 28
Email:civilair@mobilit.fgov.be

e) For movements with aircraft certified according to the standards of ICAO Annex 16, Chapter 3 or 5, the QC (Quota Count) per movement is calculated with one number after the comma as follows:

QC = 10^[(G-85)/10]
with "G":
- for the purpose of Landing:
the certified approach noise level in EPNdB of the aircraft at its MAX certified Landing weight, measured at the ICAO Annex 16 approach certification point, minus 9 EPNdB

- for the purpose of Take-off:
half the sum of the certified fly-over and the sideline noise levels in EPNdB as measured at the certification points specified in ICAO Annex 16 during the noise certification of the aircraft at its MTOW.

e) For movements with aircraft with a MTOW of no more than 8 618 kg or any other aircraft that has been certified according to the standards of one of the chapters of ICAO Annex 16, with exception of Chapters 2, 3 and 5, the Quota Count is one (QC = 1).

ENGINE RUN-UP RESTRICTIONS

Restrictions on Engine Test Runs and Idle Checks:

Engine test runs and idle checks in the open air and without silencers must be restricted to the very minimum and require prior permission from the Airport Authority.

Engine test runs can only take place on the crossing of TWY F#, Y, W1 and W2. If this crossing is not available due to infrastructural reasons, holding platform P7 may be used instead (between 0600 and 2100 only).

1.2 Between 2200 and 0459 (Night) and Between 0500 and 0559 (Early Morning)

1.2.1 Restrictions During the Night

a) Only four aircraft will be authorized to taxi at the same time to the holding position of the runway(s) in use

b) Additionally only three aircraft will be allowed to remain at the holding position awaiting takeoff clearance.

c) Engines run-up is not allowed at the holding position except for run-up tests made immediately before take-off as part of the takeoff procedure.


APU OPERATING RESTRICTIONS

Use of APU/GPU 400 Hz/PCA

a) The aircraft parking positions 140 - 172, 201 - 240 and 660 - 699 are equipped with 400 Hz and preconditioned air (PCA).

b) When arriving at one of those positions and as soon as possible (MAX 5 MIN after docking), the 400 Hz shall be immediately connected and the APU shall be switched off.

c) When departing (15 MIN before ETD) from one of those positions, the APU is allowed to be started and the 400 Hz shall be disconnected.

d) When on of the systems is unserviceable, the APU may be used.

e) When no pre-conditioned air is available, the use of the APU is allowed during periods of extreme high or low temperatures for an aircraft docked for more than one hour at the aircraft parking position on the condition that a previous authorization was obtained from the Airport inspection.

NOISE BUDGET RESTRICTIONS
Total noise quota for the airport is limited

NOISE SURCHARGE
5/2008 Updated per the IATA Airport & Air Navagation Charges Manual
*A portion of the landing charge (2.08) is allocated to the Brussels International Airport Company and another portion (1.6432) is allocated to Belgocontrol which equals the Unit Rate of 3.7232
Landing Charge: Basis MTOW
Applied to each landing and each take-off
NOTE: According to the information in the AIP, GEN 4.1-4, para 7.2 - For the calculation of the charges and fees below, each fraction of a ton is counted as a whole ton, each fraction of 10 tons is counted as a whole.
Calculation: U x W x E x D
U = Unit Rate (EUR 3.7232)* is the unit tariff
W = Weight Factor(W) The maximum authorized take off weight of the aircraft expressed in tons
Minimum Weight Factor 25 tons
Maximum Weight Factor 175 tons
E = Environmental Factor
Noise Level Category
of the Aircraft
Environmental Factor (E)
1
1.70
2
1.20
3
1.00
4
0.90
The aircraft are classified into four noise categories by BIAC in accordance with the stipulations of the management contract between the State and BIAC. Each aircraft, of which the documents necessary for the classification have been transmitted to BIAC, will be assigned to a noise category. The initial classification into a noise category or a change of noise category of an aircraft is effective on the first day of the month following receipt of the required documents. Any aircraft for which BIAC has not received the required documents will automatically be assigned to category 1 with the exception of propeller aircraft of a maximum 9 tons, which will be assigned to category 2.
D = Day/Night Factor
Day: 0600-2259 1
Night: 2300-0559 2.25

The time of landing to be taken into account is the actual time at which the aircraft touches down. The take off time is the actual time at which the aircraft lifts off.


Aircraft Noise Categories

Basic principle:

A theoretical reference curve is drawn up according to the maximum authorized take off weight expressed on tons (MTOWTON) and the number of engines.

This curve is determined by the following formula:

PRED=LAT+APP+TKO

In which the parameters, dependent on the MTOWTON and the number of engines, take the values mentioned in the tables below.

LAT parameter
weight 0-35 tons 35-400 tons 400 tons and more
LAT=94 LAT=80.87+8.51 log MTOWTON LAT=103
APP parameter
weight 0-35 tons 35-280 tons 280 tons and more
APP=98 APP=86.03+7.75 log MTOWTON APP=105
TKO parameter 1 or 2 engines
weight 0-48.1 tons 48.1-385 tons 385 tons and more
TKO=89 TKO=66.65+13.29 log MTOWTON TKO=101
TKO parameter 3 engines
weight 0-28.6 tons 28.6-385 tons 385 tons and more
TKO=89 TKO 69.65+13.29 log MTOWTON TKO=104
TKO parameter 4 engines and more
weight 0-20.2 tons 20.2-385 tons 385 tons and more
TKO 89 TKO=71.65+13.29 log MTOWTON TKO=106

PRED gives the reference value in EPNdB (Effective Perceived Noise Level) for a given aircraft. The determination of the noise category of an aircraft is based on the data of its noise certificate established according to ICAO provisions.

In order to determine the noise category of an aircraft the sum TOTNOISE of the noise levels expressed in EPNdB for the lateral noise, the take off and landing noise, mentioned on the noise certificate of the aircraft, is compared with the PRED value which corresponds to the characteristics of this aircraft.

Determination of noise categories:

In view of the fixed theoretical reference curve, the four categories are determined as followed.


Category 1 TOTNOISE > PRED -4dB
Category 2 PRED -12 dB < TOTNOISE = or < PRED -4dB
Category 3 PRED -20 dB < TOTNOISE = or < PRED -12dB
Category 4 PRED -20 dB > or = TOTNOISE

Procedure for Classification into Noise Categories:

- For a given aircraft the sum TOTNOISE is made on the basis of three noise certification data (lateral, landing and takeoff)

- The corresponding PRED value is calculated by means of the above mentioned formula on the basis of MTOWTON value (maximum authorized takeoff weight expressed in tons) and the number of engines.

- By comparison between the PRED value and the TOTNOISE value, the noise category is determined on the basis of the criteria mentioned above.

- In principle, the determination of the TOTNOISE value is based on the results obtained according to ICAO provisions from noise certification of "Chapter 3" aircraft, i.e. at 2000 m from the landing threshold below the descent path, at 6500 m from the start of roll below the climb-out path at takeoff, at 450 m from the runway center line for the lateral value.

- As the lateral measurements for "Chapter 2" aircraft, are carried out at 650 m, the lateral value for these types of aircraft has to be increased by 2.1 dB

- In default of certification data according to ICAO provisions, the certification data according to FAA provisions may also be used.

- For certain types of aircraft, for which no noise certification is required and for which noise data are not or only partially available, an appropriate procedure is worked out together with the operator in order to establish a realistic TOTNOISE.

NOISE MITIGATION/LAND USE PLANNING PROGRAM INFORMATION
Type of Program
Date Implemented
Status
Sound Insulation (Residences and Public Buildings)
-
Under discussion
Purchase Assurance for Homeowners Located Within the Airport Noise Contours
-
Under discussion
Avigation Easements
-
Under discussion
Zoning Laws
-
Under discussion
Real Estate/Property Disclosure Laws
-
Under discussion
Acquire Land for Noise Compatibility to date
-
Under discussion
Population within each noise contour level relative to aircraft operations
-

Under discussion (sound insulation aspects)

Airport Noise Contour Overlay Maps
-
Under discussion
Total Cost of Noise Mitigation Programs to Date
-

Under discussion (sound insulation aspects)

Source of Noise Mitigation Program Funding for Aircraft Noise
-
Under discussion

NOISE MONITORING SYSTEM

Click here for a full size map of the noise monitor locations provided by the airport
Noise Monitor Locations
NMT Latitude Longitude Administrator
Type
Started
Monitoring
Ended
Monitoring
Notes
01 50.915174 4.502614 Brussels Airport
V
1991   1
02 50.903145 4.537863 Brussels Airport
V
1991    
03-2 50.89893 4.510158 Brussels Airport
V
2004/06/22   1, 2
04 50.878354 4.486452 Brussels Airport
V
1991    
06 50.859374 4.41586 Brussels Airport
V
1991    
07 50.861489 4.511564 Brussels Airport
V
1991    
08 50.939228 4.591188 Brussels Airport
V
1991    
09 50.9315 4.50084 Brussels Airport
V
1991    
10 50.907491 4.394356 Brussels Airport
V
1991    
11 50.82735 4.465687 Brussels Airport
V
1991    
12 50.811436 4.550541 Brussels Airport
V
1991    
13 50.936672 4.374101 Brussels Airport
V
1991    
14 50.918523 4.321668 Brussels Airport
V
1991    
15 50.888609 4.477966 Brussels Airport
V
1991   1
16 50.920771 4.614878 Brussels Airport
V
1991    
19-1 50.917348 4.407999 Brussels Airport
SM
2003/01/09 2005/07/01  
19-2 50.917562 4.410943 Brussels Airport
SM
2005/07/01    
20 50.912483 4.432494 Brussels Airport
SM
2003/01/11    
21 50.911286 4.355272 Brussels Airport
SM
2003/01/09    
23 50.915375 4.507378 Brussels Airport
SM
2004/08/31   1
24 50.843789 4.468305 Brussels Airport
SM
2004/06/02    
26 50.872929 4.350012 Brussels Airport
SM
2004/03/05    
30 50.892903 4.416946 BIM/IBGE
V
1997/04/01    
31 50.870194 4.396438 BIM/IBGE
V
1996/01/01    
34-2 50.851695 4.340633 BIM/IBGE
V
2003/11/05   2
36 50.899988 4.364345 BIM/IBGE
V
2003/08/01   2
38 50.839402 4.458103 BIM/IBGE
V
2003/12/04   2
39-2 50.83242 4.465286 BIM/IBGE
V
2004/05/05   2
40 50.912986 4.371766 LNE
V
2001/10/05    
41 50.927377 4.3611 LNE
V
2002/09/27    
42 50.897199 4.436453 LNE
SM
2003/01/29    
43 50.903707 4.558208 LNE
SM
2003/02/07    
44 50.83318 4.526694 LNE
V
2002/04/04    
45 50.930343 4.319608 LNE
SM
2003/01/01    
46-1 50.846877 4.473154 LNE
M
2003/12/05 2005/05/25  
46-2 50.84544 4.472199 LNE
SM
2005/10/18    
47-1 50.791788 4.585623 LNE
M
2005/07/05 2005/11/05  
47-2 50.856714 4.488429 LNE
SM
2004/05/28   2
48 50.870985 4.624944 LNE
M
2005/06/10 2005/08/05  
51-1 50.904328 4.384688 BIM/IBG
V
2003/11/26 2005/05/06 2
51-2 50.904444 4.389777 BIM/IBG
V
2005/01/29   2
52 50.86223 4.283572 BIM/IBG
V
2003/11/26   2
1 - Monitor located close to the airport
2 - monitor that is not reported

V = Fixed monitor
M = Mobile monitor
SM = semi mobile monitor

FLIGHT TRACK MONITORING SYSTEM - NONE

NOISE LEVEL LIMITS
- noise limits only are applicable in Brussels Region.  This region is located west of the airport of Brussels

- for the Brussels Region 3 zones are determined with each their own limits.

- the limits are not set for individual NMTs, but for zones

- within these zones, the limits are more stringent further away from the airport

- Noise limits are as well expressed in limits per individual movement (SEL) as in limits for global noise charge (LAeq)

- Separate limits exist for day and night.

SUMMARY OF THE DECREE FROM THE BRUSSELS CAPITAL REGION ON THE REPRESSION AGAINST NOISE POLLUTION GENERATED BY THE AIRLINE TRAFFIC dd 27.5.99. [published in the Belgian Official Gazette dd 11.8.1999]

BRUSSELS CAPITAL-REGION MINISTRY OF
THE BRUSSELS-CAPITAL REGION

27.5.1999 - Decision by the Brussels-Capital Government with respect to the repression against noise pollution generated by the airline traffic. The Brussels-Capital Government, In view of the recommendation dd 17.7.1997 regarding the repression of the noise pollution in urban environment, more particularly article 9; In view of the recommendation from the Environmental Board dd 04.3.1998; In view of the decision taken by the Brussels-Capital Government dd 16.7.1998 with respect to the request for advice within one month; In view of the advise rendered by the Raad van State [Highest legal Authority] dd 20.4.1999 in application of article 84, para 1, item 1 on the co-ordinated laws from the Raad van State;

On recommendation of the Minister of Environment; After deliberation :
Has ordered :

Definitions

Art.1 For the application of this decision following factors need be taken into account [indicates a summary of key technical factors which will be each part of the applicable formula for measurement]

1. The level of acoustic pressure equivalent or LAEQ,T: level of acoustic pressure expressed in dB(A) which is supposed to generate the same exposure to noise then a fluctuating noise during measurement T, as defined in article 1, item2, of the decision of the Government of the Brussels-Capital Region dd 02.7.1198 which defines the method for control and the conditions for measurement of noise;

2. Event : the overflight of an aeroplane that produces more then 70 dB(A) measured in LAEQ, 1sec;

3. t : period of time corresponding to the length of the event prolonged by 10 seconds immediately before and after the event under consideration;

4. .Sound Exposure Level (SEL) : the level of exposure expressed in dB(A) calculated by the following formula:

SEL= LAEQ,t + 10 X log 10 t / 1sec

5. LEVT : the SEL value calculated for the event under consideration;

6. .LSP aeroplane : LAEQ,T specific to noise produced by a source of ambient noise, generated by aeroplanes and calculated for a defined period of observation;

7. Zone 2 : area located north-east situated in between the borders of the regional territory and the radius central point fixed by co-ordinates 50'54.2'N - 004'32.4'E with a radius length of 10,000 meters;

8. Zone 1 : area located north-east situated in between the borders of the regional territory the limits of zone 2 and the radius central point fixed by co-ordinates 50'54.2'N - 004'32.4'E with a radius length of 12,000 meters;

9. Zone 0 : a zone of the regional territory which is not covered by zones 1 and 2;

10. Day : period for measurement between 07hrs and 23hrs (local time);

11. Night : same but between 23hrs and 07hrs (local time);

Limits

Art.2
Regardless of the weather conditions, L-levels LEVT and LSP aeroplane [above item 5 and 6] are not to exceed the following values:

Locations
LEVT in
dB(A)
LSP aeroplane in
dB(A)
day
night
day
night
0
80
70
55
45
1
90
80
60
50
2
100
90
65
55

Conditions for measurement

Art.3 The microphone having a wind envelop attached to it, needs be placed outside on a height between 1,5 and 25 meters above the ground and at least 1,5 of any wall of whatever nature;

For specific measurements the equipment is being checked against the standards prior to each series of measurements. For measurements being made at the usual measurement locations the same checking of the equipment against standards is made on a regular basis and minimum once per week.

Characteristics of the measurement equipment and annex reporting

Art.4
The characteristics of the equipment for measurement and the measurement reports are conform articles 11 and 12 of the Decisions taken by the Brussels-Capital Government dd 02.7.1998 which ruled the methods of control and circumstances for measurement of noise.

Adjustment of the limits

Art.5
At the end of an adaptation period decided by the Government, the limits per overflight and per period are automatically and by law enforcement brought in line with the values as follows :


Locations
LEVT in
dB(A)
LSP aeroplane in
dB(A)
day
night
day
night
0
75
70
55
45
1
85
75
55
45
2
90
80
60
50
Transition ruling
Art.6 The norms indicated under article 2 are applicable as from 01.1.2000.

Execution

Art.7 The Minister for Environment is entrusted with the execution of this Decision

Brussels, 27.5.1999
Names signing parties

CHAPTER 2 RESTRICTIONS

1.3 Chapter 2 Aircraft

1.3.1 Take off and landing of aircraft classified as "Chapter 2" according to the criteria published in ICAO Annex 16 are forbidden.

1.3.2 Are excluded from this prohibition:

- Takeoff and landing performed by aircraft carrying members of the Belgian Royal Family, the Belgian Government, the Regional and Community Governments, Foreign Royal Families, Heads of State of leaders of foreign governments, presidents and commissioners of the European Union, on official missions:

- Takeoff and landing performed with regard to missions in case of disasters or for the purpose of medical assistance;

- Takeoff and landing concerning military missions;

- Takeoff and landing , performed in exceptional conditions such as:

- flights which there is an immediate danger to the life or health of persons as well as animals

- flights diverted for meteorological reasons.

1.3.3 Exceptionally and on explicit justified requests, the Minister of Mobility and Transport may authorize a take off or landing of a non-compliant aircraft.

The operator of a flight seeking an exemption shall obtain prior permission from:

Civil Aviation Authority
CCN - 4th floor
Rue du Progres/Voorultgangstraat, 80 Box 5
B-1030 Brussels
Belgium

Take off and landing of aircraft classified as "Chapter 2" according to the criteria published in ICAO Annex 16 are forbidden.

Are excluded from this prohibition:

- Takeoff and landing performed by aircraft carrying members of the Belgian Royal Family, the Belgian Government, the Regional and Community Governments, Foreign Royal Families, Heads of State of leaders of foreign governments, presidents and commissioners of the European Union, on official missions;

- Takeoff and landing performed with regard to missions in case of disasters or for the purpose of medical assistance;

- Takeoff and landing concerning military missions;

- Takeoff and landing , performed in exceptional conditions such as:

- flights which there is an immediate danger to the life or health of persons as well as animals

- flights diverted for meteorological reasons

Exceptionally and on explicit justified requests, the Minister of Mobility and Transport may authorize a take off or landing of a non-compliant aircraft.
The operator of a flight seeking an exemption shall obtain prior permission from:

Mail:
Civil Aviation Authority
CCN
Rue du Progrès / Vooruitgangstraat, 80/5
B-1030 Brussels
BELGIUM
Tel:++32 (0)2 206 32 11
Fax:++32 (0)2 203 15 28
Email:civilair@mobilit.fgov.be


CHAPTER 2 PHASEOUT

Chapter 2 airplanes >75,000 lbs are ban from operating in EU Member States as of April 1, 2002.

CHAPTER 3 RESTRICTIONS
Only at night - see airport curfew QC category information.

Noise Abatement Provision in Belgium

Effective 1 July 2003 and onwards, flights of re-certificated civil subsonic jet aeroplanes between 2200 and 0500 are only authorized in clean configuration (landing gear and wing flaps retracted).

- Civil Subsonic jet aeroplane" means a civil subsonic jet aeroplane with a maximum certificated take-off mass of 34,000 kg or more or with a certified maximum internal accommodation for the aeroplane type in question consisting of more than 19 passenger seats, excluding any seats for crew only, and powered by engines with a by-pass ratio of less than three.

- Re-certificated civil subsonic jet aeroplanes" means a civil subsonic jet aeroplane initially certificated to Chapter 2 or equivalent standards, or initially not noise certificated which has been modified to meet Chapter 3 standards, either directly through technical measures or indirectly through operational restrictions: civil subsonic jet aeroplanes which initially could only be dual-certificated to the standards of Chapter 2 by means of weight restrictions, have to be considered as re-certificated aeroplanes; civil subsonic jet aeroplanes which have been modified to meet Chapter 3 standards by being completely re-engined with engines having a by-pass ration of three or more are not to be considered as re-certificated aeroplanes.