SDR ASMF20190109003

Service difficulty report · Fan · Boeing 7878

Difficulty date: October 24, 2018
Submitted: January 9, 2019
Operation: Air carrier
Aircraft: N965AM
Make and model: Boeing 7878
Aircraft serial: 35308
Aircraft time: 22,834 hours, 2,854 cycles
System (JASC): 2121 · Air Distribution Fan
Part: Fan
Part number: 7010136H10
Part serial: 4365856
Condition: Failed
Location: Left
Part time: 22,834 hours, 2,854 cycles
Stage of operation: IN
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

DURING TRANSIT CHECK, THE MESSAGE IN EICAS AND STATUS PACK MODE L WAS SHOWN. MAINTENANCE PERSONNEL PERFORMED FIM DMC-B787-A-21-50-F2-78A-421A PROCEDURE, SHOWING FAILURE CODE 21-65421, DETECTING THE RAM AIR FAN WITH FAILURE; SO THE RAM AIR FAN WAS REPLACED IAW AMM DMC-B787-A-21-52-33-00B-520A-A AND AMM DMC-B787-A-21-52-33-00B-720A-A, TESTED CORRECT.

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