SDR UIEA2020101272187

Service difficulty report · Tru · Boeing 7673Y0

Difficulty date: October 6, 2020
Submitted: October 12, 2020
Operation: Air carrier
Aircraft: N1181A
Make and model: Boeing 7673Y0
Aircraft serial: 26206
Aircraft time: 88,596 hours, 22,235 cycles
System (JASC): 4940 · APU Start/Ignition System
Part: Tru
Part number: 28VS200Y4B2
Part serial: 12076850
Condition: Malfunctioned
Location: Apu
Stage of operation: TX
How discovered: 9
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 FAULT ON FIRST ATTEMPT. TRANSFERRED TO MDDR 135610, PER DDG 49-11-01A. REMOVED AND REPLACED APU TRANSFORMER RECTIFIER UNIT, AS PER AMM 24-32-04 AND APU FAULT ANN SWITCH ASSEMBLY, AS PER AMM 33-16-02. OPERATIONAL CHECKS FOUND OK. THIS WILL CLEAR MDDR 135610.

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