Service difficulty report · Actuator · Boeing 76731K

Difficulty date
August 2, 2019
Submitted
August 6, 2019
Operation
Air carrier
Aircraft
N1487A
Make and model
Boeing 76731K
Aircraft serial
28865
Aircraft time
85,620 hours, 17,320 cycles
Part
Actuator
Part number
3790076105
Part serial
1491
Condition
Failed
Location
Apu
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

APU COLD SOAK START FL 380, -43 C, THREE ATTEMPTS UNSUCCESSFUL. PERFORM APU BITE CHECK IAW FIM 49-11- FT 987. FOUND MINI FLAG 36, 38, 42, 66. FAULTS ECU SCV DRIVER SHORTED, ECU IGV ACTUATOR FAIL AND POSITION OF IGV NOT MATCHING. R & R APU IGV ACTUATOR IAW AMM 49-52-02. PERFORMED FIM 49-11 FT 987 APU BITE PROCEDURE, NO FAULTS NOTED. NO FLAGS NOTED. PERFORMED OPS CHECK OF APU IAW AMM 49-11-00, OPS CHECKED GOOD.

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