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SDR UALA2012112006704

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Service difficulty report · Unknown · Boeing 747422

FAA SDR system

Difficulty date
November 19, 2012
Submitted
December 13, 2012
Operation
Air carrier
Aircraft
N174UA
Make and model
Boeing 747422
Aircraft serial
24381
Aircraft time
89,017 hours, 9,927 cycles
Engine
Pwa PW4056
System (JASC)
5230 · Cargo/Baggage Doors
Part
Unknown
Condition
Malfunctioned
Location
Cargo Door
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFT CARGO DOOR. ACCOMPLISHED POWER OPERATION OF THE DOOR, DOOR OPENED FULLY. WHEN DOOR REACHED FULL OPEN POSITION DOOR OPENING ACTUATOR CONTINUED TO RUN WITH SWITCH HELD TO OPEN POSITION. CYCLED DOOR SEVERAL TIMES AND COULD NOT DUPLICATE REPORTED CONDITION. TRIED TO PERFORM CARGO DOOR PWR SHUTOFF SYS INSP-CHECK PER MM AND WDM. COULD NOT LOCATE RELAY R9423 & R9424 TO VERIFY REF COA84205. REF ECRA5235-01001 AMM 52-34-79 SHOULD READ TO SHOW COA 84205 NO LONGER APPLICABLE RE-DIRECTED TO COA 848790. SYSTEM NOW OPERATES AS DIRECTED.