Results
94-14-07 R1: This amendment revises an existing airworthiness directive (AD), applicable to all Jetstream Model 4101 airplanes, that currently requires modification of the mounting structure of the elevator controls on the rear pressure bulkhead. That AD was prompted by results of a structural analysis which indicate that certain structure in the elevator control system may be subject to deformation when maximum load is exerted by the pilot(s) in the event of a jam in the elevator control cables. The actions specified in that AD are intended to prevent reduced controllability of the airplane due to structural deformation in the elevator control system. This amendment limits the applicability of the rule.
94-07-10 R1: This amendment revises AD 94-07-10, which currently requires the following on Fairchild Aircraft SA226 and SA227 series airplanes: repetitively inspecting (visually) the wing skin for cracks; dye penetrant inspecting the rib straps if the wing skin is found cracked; and, if any crack is found in the rib straps, repairing the rib straps and modifying the wing skin. That AD references an incorrect dye penetrant inspection when the wing skin is found cracked. This action maintains the requirements of AD 94-07-10, but incorporates reference to the correct dye penetrant inspection for when the wing skin is found cracked. The actions specified by this AD are intended to prevent failure of the wing skin at the top aft outboard corner of the battery box, which could result in structural damage to the wing.
94-15-02: This amendment supersedes an existing airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 series airplanes, that currently requires inspections to verify the installation of shear pins, shear pin retainers, and shear pin retainer attaching parts in the aft end of the center pylon thrust link, and repair, if necessary. That AD was prompted by a report that both shear pins that attach the aft end of the center engine pylon thrust link to the tail pylon were missing. This amendment adds inspections to verify that the shear pin retainer attaching parts are tightened within specified limits; and adds a terminating modification for those inspections. This amendment also expands the applicability of the rule to include additional airplanes. The actions specified by this AD are intended to prevent structural damage to the engine mount structure, which could lead to loss of airplane components.
2008-02-02: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: It has been found that the implementation of the Inertial Reference Units (IRU) on the ERJ-170 [and ERJ-190] may lead, in certain degraded modes, to an erroneous Flight Path Angle (FPA) indication on both Primary Flight Displays, with no alert to the flight crew. On the ERJ-170 [and ERJ-190], FPA is considered as important as pitch and bank angle for piloting purposes. The unsafe condition is reduced ability of the flightcrew to control the flight path of the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products.
2011-11-06: We are superseding an existing airworthiness directive (AD) that applies to the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: In June 2000, prompted by a crack found at the top of the Nose Landing Gear (NLG) oleo, BAE Systems Operations) Ltd (BAE Systems) issued Inspection Service Bulletin (ISB) ISB.32-158. * * * Later, as part of an accident investigation, the examination of a fractured NLG main fitting showed that M-D (Messier-Dowty) SB.146- 32-150 was not accomplished * * *. BAE Systems determined that more NLG units could be similarly affected. * * * Subsequently, investigation and analysis by M-D identified the need for a reduction of the inspection threshold and the repetitive inspection interval for the affected NLG units * * *. * * * * ** * * [I]nvestigation by M-D showed that if any undetected crack was present at the time of the embodiment of M-D SB 146-32-150, Part B or Part C, it could continue to grow while the NLG is in service and could lead to the failure of the main fitting and possible collapse of the NLG. * * * [B]AE Systems have received additional reports of cracked NLG main fittings. One operator reported a crack in a premodification main fitting. * * * * * * * * Undetected cracks could lead to failure of the NLG Main Fitting and collapse of the NLG. * * * * * The unsafe condition is cracking of the NLG, which could adversely affect the airplane's safe landing. We are issuing this AD to require actions to correct the unsafe condition on these products.
2018-15-03: We are adopting a new airworthiness directive (AD) for The Boeing Company Model 787 series airplanes powered by Rolls Royce Trent 1000 engines. This AD was prompted by a report of failures of the inner fixed structure (IFS) forward upper fire seal and damage to thermal insulation blankets in the forward upper area of the thrust reverser (TR). This AD requires an inspection to determine the part number of the IFS forward upper fire seal, and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.
94-14-18: This amendment adopts a new airworthiness directive (AD) that is applicable to certain de Havilland Model DHC-8-100 series airplanes. This action requires repetitive inspections of the hydraulic selector valve to determine the rate of leakage of hydraulic fluid, and replacement of certain valves with serviceable valves, if necessary. This AD also provides an optional terminating action for the repetitive inspections. This amendment is prompted by a report of pilot valve leakage of hydraulic fluid in a landing gear selector valve on a Model DHC-7 series airplane. The actions specified in this AD are intended to prevent inadvertent retraction of the landing gear in the event of a low voltage condition at the selector valve down solenoid.
2007-26-21: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Icing tunnel tests on an EMB-120 wing section, conducted under a joint Embraer-NASA (National Aeronautics and Space Administration)-- FAA-CTA (Centro Tecnico Aeroespacial) research program well after the EMB-120( ) was type-certificated, have shown that stick shaker to stick pusher speed margins may drop below the minimum required by the applicable regulations in certain icing conditions. Although flight tests have shown that the aircraft handling qualities are not adversely affected, these reduced speed margins may significantly increase crew workload in certain flight phases. The unsafe condition is reduced ability of the flightcrew to maintain thesafe flight and landing of the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products.
2001-12-18: This amendment adopts a new airworthiness directive (AD), applicable to certain CASA Model CN-235 series airplanes, that requires modification of the rigging of the engine control cable assembly and replacement of either the entire engine control cable assembly or a segment of the control cables. This amendment is prompted by issuance of mandatory continuing airworthiness information issued by a foreign airworthiness authority. The actions specified by this AD are intended to prevent fatigue of the engine control cables, leading to breakage of the cables, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
2020-05-01: The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd. & Co KG (RRD) Trent 1000-AE3, Trent 1000- CE3, Trent 1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, and Trent 1000-R3 model turbofan engines. This AD requires initial and repetitive borescope inspections (BSI) of the high-pressure turbine (HPT) blades. This AD also requires replacement of HPT blades with parts eligible for installation when the HPT blades fail inspection or reach the new life limit. This AD was prompted by the manufacturer identifying that the HPT blades may fail prematurely. The FAA is issuing this AD to address the unsafe condition on these products.