Airworthiness Directive · Amendment 39-13846 · McDonnell Douglas Model MD-11 and -11F Airplanes
McDonnell Douglas Model MD-11 and -11F Airplanes
Model MD-11 and -11F airplanes, as listed in Boeing Service Bulletin MD11-22-026, dated December 19, 2003; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 and -11F airplanes, that requires an inspection of the auto throttle servo (ATS) assembly and corrective actions if necessary. The actions specified by this AD are intended to prevent electrical shorting of the brake coils of the ATS, which could result in smoke in the cockpit and/or passenger cabin. This action is intended to address the identified unsafe condition.
To prevent electrical shorting of the brake coils of the auto throttle servo (ATS), which could result in smoke in the cockpit and/or passenger cabin, accomplish the following:
(a) Within 36 months after the effective date of this AD, do an inspection to determine the part number (P/N) of the ATS assembly of the servo assembly of the TCM, in accordance with the Accomplishment Instructions of Boeing Service Bulletin MD11-22-026, dated December 19, 2003.
(b) Before further flight after doing the inspection required by paragraph (a) of this AD, do the applicable corrective action(s) specified in “Table-Corrective Actions,” in accordance with Boeing Service Bulletin MD11-22-026, dated December 19, 2003.
| If— | Then— |
|---|---|
| (1) P/N 4059004-903 is installed | Reidentify the TCM assembly. |
| (2) P/N 4059004-903 is not installed | Replace the existing ATS assembly of the TCM assembly with a new ATS assembly, and reidentify the TCM assembly; or return TCM assembly to Boeing for modification and reidentification. |
(c) As of the effective date of this AD, no person shall install a thrust control module assembly having part number ABH7760-1, ABH7760-501, ABH7760-503, SR11761001-3, SR11761001-5, SR11761001-7, SR11270022-3, SR11761001-9, SR11270022-5, or SR11761001-11, on any airplane.
(d) In accordance with 14 CFR 39.19, the Manager, Los Angeles Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD.
