SDR ASAA11510606

Service difficulty report · Connector · Boeing 737890

Difficulty date: October 31, 2011
Submitted: December 9, 2011
Operation: Air carrier
Aircraft: N533AS
Make and model: Boeing 737890
Aircraft serial: 35201
Aircraft time: 3,016 hours, 998 cycles
Engine: Cfmint CFM567B27
System (JASC): 7597 · Engine Bleed Air System Wiring
Part: Connector
Condition: Dirty
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

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

What was found

WHILE ACCOMPLISHING T/C 78273000, INTERROGATE THE FMC CDU FOR ENGINE FAULTS. FOUND FAULT CODE 75-10831 THE T3 SIGNAL IS OUT OF RANGE. (LONG TIME FAULT). ACFT GROUNDED. FAULT NOT ACTIVE NO RECENT OR FAULT HISTORY. VERFIED T3 CHANNEL A & CHANNEL B DATA DISPLAYED. CLEANED DP0905 & DP1005 CONNECTORS, VERIFIED GOOD PIN TENSION RESISTANCE CHECKED T3 SENSOR CHANNEL A 3.1, CHANNEL B 3.0 OHM. REINSTALLED CONNECTORS REPAIR CONFIRMED. FAULT INTERMITTENT AT TIME OF WRITE UP. REF FIM 75-33-00-810-802-F00.