Checks for GE-powered
DC-10s include a holding torque check of the pneumatic drive motor's
internal disc brake; an inspection of the translating cowl air seal,
fairing, and the aft frame; and checks of the feedback rod-to-yoke
alignment, translating cowl autorestow function, position indication
for the overpressure shutoff valve, in-flight lockout system function,
and fan reverser operation.
Inspections of P&W-powered
DC-10s involve checking the stow latch, P-seal/bullnose seal, pneumatic
drive unit latch, indication circuitry, running torque, in-flight
lockout, and thrust reverser operation.
These inspections are
further defined in Boeing Service Bulletin DC10-78A056 and Middle
River Aircraft Systems Service Bulletins 78-2004 and 78-3001 for
GE-powered DC-10s and Boeing Service Bulletin DC10-78A057 for P&W-powered
DC-10-40s. These bulletins will be revised to include additional
checks of modified indication systems and new locking systems. The
FAA issued a Notice of Proposed Rulemaking (NPRM) in November 1999.
An airworthiness directive (AD) mandating the repetitive inspections