SDR ASAA2015052111823

Service difficulty report · Tru · Boeing 737890

Difficulty date: May 21, 2015
Submitted: May 26, 2015
Operation: Air carrier
Aircraft: N506AS
Make and model: Boeing 737890
Aircraft serial: 35690
Aircraft time: 26,591 hours, 8,209 cycles
Engine: Cfmint CFM567B27
System (JASC): 2430 · DC Generating System
Part: Tru
Condition: Malfunctioned
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

FOUND TR UNIT LIGHT ILLUMINATED DURING PPR-FLIGHT. GROUNDED - YES. CREW ALSO REPORTS A/C WOULD NOT ACCEPT GROUND POWER. FOUND TRU 1, TRU 2, AND TRU 3 C/B'S OUT. CHECKED. NO HISTORY - 60 DAYS. GVI BEHIND PANELS AND AT TRU'S GOOD. SUSPECT GROUND POWER FAULT, MISSING A PHASE. RESET SAME 3 EA C/B'S. THEY RESET NORMAL AND STAY IN. REF MM 20-60-01. OPS CHECK SAME TRU 1, TRU 2, AND TRU 3. NO TRU FAIL LIGHT ON. REF MM 24-32-11.