Airworthiness Directive · Amendment 39-19133 · Doors
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 757-200 series airplanes, certificated in any category, that have been converted from passenger to freighter configuration as specified in any of the VT Mobile Aerospace Engineering Inc. supplemental type certificates (STCs) identified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD.
(1) STC ST03562AT (14 pallet) (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/7239683609eb1b4086257ff1004d0f2b/$FILE/ST03562AT.pdf).
(2) STC ST04242AT (15 pallet) (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/edd46d607cedd3a286257ff1004d8d82/$FILE/ST03952AT.pdf.)
(3) STC ST03952AT (combi—airplanes that can carry passenger, freight, or both in the cabin) (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/edd46d607cedd3a286257ff1004d8d82/$FILE/ST03952AT.pdf).
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757-200 series airplanes. This AD was prompted by a report indicating that the main cargo door (MCD) forward-most cam latch on the forward center cam latch pair broke during flight. This AD requires repetitive inspections for discrepancies of cam latches, latch pins, and latch pin cross bolts of the MCD; replacement of all alloy steel latch pin cross bolts with corrosion-resistant steel (CRES) latch pin cross bolts of the MCD; and related investigative and corrective actions if necessary. We are issuing this AD to address the unsafe condition on these products.
At the applicable time specified in paragraph I.D., “Compliance,” of VT Mobile Aerospace Engineering Inc. Service Bulletin MAE757SF-SB-52-12/02, Revision 3, dated July 22, 2016 (“SB MAE757SF-SB-52-12/02, R3”), except as required by paragraph (h)(1) of this AD; or within 30 days after the effective date of this AD, whichever occurs later: Do the actions specified in paragraphs (g)(1) through (g)(4) of this AD, and do all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of SB MAE757SF-SB-52-12/02, R3, except as specified in paragraph (h)(2) of this AD. Do all applicable related investigative and corrective actions before further flight. Repeat the inspections specified in paragraphs (g)(1), (g)(2), and (g)(4) of this AD thereafter at the applicable intervals specified in paragraph I.D., “Compliance,” of SB MAE757SF-SB-52-12/02, R3.
(1) Do a general visual inspection for any broken or missing cam latches, latch pins, and latch pin cross bolts of the MCD.
(2) Do a detailed inspection for any cracks or gouges in critical areas of the cam latches and latch pins of the MCD and for any cam latches with lip deformation.
(3) Replace all previously unreplaced alloy steel latch pin cross bolts with corrosion resistant steel (CRES) latch pin cross bolts of the MCD.
(4) Do a high frequency eddy current (HFEC) or magnetic particle inspection for any cracks in the critical areas of cam latch 1 and cam latch 2 of the MCD.
(1) Where the “Condition” column of table 1 of paragraph I.D., “Compliance,” of SB MAE757SF-SB-52-12/02, R3, refers to airplanes meeting certain conditions identified in “Condition 1,” for this AD, “Condition 1” applies to all airplanes.
(2) Where the Accomplishment Instructions of SB MAE757SF-SB-52-12/02, R3, specify doing actions only for airplanes that have completed a certain rig and check of the MCD, this AD requires doing those actions on all airplanes.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
