Service difficulty report · Contactor · Boeing 767328

Difficulty date
July 13, 2021
Submitted
July 23, 2021
Operation
Air carrier
Aircraft
N1499A
Make and model
Boeing 767328
Aircraft serial
27428
Aircraft time
83,280 hours, 18,671 cycles
Part
Contactor
Part number
CC07081MUA34
Part serial
PQ80
Condition
Faulted
Location
Apu Starter
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

APU WOULD NOT START AT BLOCK IN. EICAS MESSAGE APU FAULT BOTH TIMES.(<P>PERFORMED APU BITE PROCEDURE REF B767 FIM 49-11 FT 987. FOUND MINIFLAG 34 AND "START ABORTED" MESSAGE. PERFORMED B767 FIM 49-11 FT 989 AND FOUND NO FURTHER DEFECTS. RESET ECU AND STARTED APU ON FIRST ATTEMPT SATISFACTORY. ALL APU PARAMETERS NORMAL. OK TO CONTINUE.</P> / <P>LP 1393836, ITEM M5: APU INOP PER ENGINEERING'S REQUEST. TRANSFERRED TO MDDR # 150135 PER MEL 49-11-01A, CAT "C". DUE: 23JUL21. PLACARDS INSTALLED. MCC ADVISED. DISPATCH: JT 21:22Z.</P> / <P>LOGPAGE 1343113 ITEM 5 AND LOGPAGE 1343114 ITEM 8: REMOVED AND REPLACED APU OIL TEMP SWITCH IAW AMM 49-27-14. LEAK CHECK GOOD. SEE LP 1343113 ITEM M7 FOR FURTHER WORK. REMOVED AND REPLACED APU CRANK CONTACTOR IAW AMM 49-41-05. OPS CHECK GOOD.