Airworthiness Directive · Amendment 39-12021 · McDonnell Douglas Model MD-11 Series Airplanes
McDonnell Douglas Model MD-11 Series Airplanes
Model MD-11 series airplanes, as listed in McDonnell Douglas Alert Service Bulletin MD11-24A182, dated April 3, 2000; certificated in any category.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 series airplanes, that requires an inspection of the electrical wires routed above the door actuation cables for minimum .50-inch clearance with the door in the open and closed position, damage due to chafing or electrical arcing, or damaged door actuation cables; and corrective actions, if necessary. This action is necessary to prevent damaged electrical wires or damaged door actuation cables due to chafing by the cables during operation of the forward passenger door, which could result in electrical arcing and consequent smoke in the area above the forward passenger door. This action is intended to address the identified unsafe condition.
To prevent damaged electrical wires or damaged door actuation cables due to chafing by the cables during operation of the forward passenger door, which could result in electrical arcing and consequent smoke in the area above the forward passenger door, accomplish the following:
(a) Except as provided by paragarph (b) of this AD, within 6 months after the effective date of this AD, perform a one-time general visual inspection of the electrical wires routed above the door actuation cables for minimum.50-inch clearance with the door in the open and closed position, damage due to chafing or electrical arcing, or damaged door actuation cables, in accordance with McDonnell Douglas Alert Service Bulletin MD11-24A182, dated April 3, 2000.
Note 2: For the purposes of this AD, a general visual inspection is defined as “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or drop-light, and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
(1) If minimum.50-inch clearance exists between the electrical wires and door actuation cables with the door in the open and closed positions, and if no chafed electrical wiring or damaged door actuation cable is detected, no further action is required by this AD.
(2) If less than.50-inch clearance exists between the electrical wires and door actuation cables with the door in the open and closed positions, and if no chafed electrical wiring or damaged door actuation cable is detected, before further flight, loosen wire clamps as necessary, reposition electrical wires to provide minimum clearance, and tighten wire clamps, in accordance with the service bulletin.
(3) If less than.50-inch clearance exists between the electrical wires and door actuation cables with the door in the open and closed positions, and if any chafed electrical wiring or damaged door actuation cable is detected, before further flight, replace damaged electrical wires with new wires or repair damaged wires, loosen wire clamps as necessary, reposition electrical wires to provide minimum clearance, tighten wire clamps, and replace damaged door actuation cables with new cables, in accordance with the service bulletin.
(b) For Model MD-11 series airplanes, the inspection required by paragraph (a) of this AD is only applicable to functioning doors. For Model MD-11F series airplanes or Model MD-11 series airplanes converted to a freighter configuration, equipped with one or more disabled non-functioning doors that do not have door acuating cables, the inspection is NOT required for those disabled doors.
