SDR ASAA2014041207528

Service difficulty report · Probe · Boeing 737890

Difficulty date: April 12, 2014
Submitted: April 15, 2014
Operation: Air carrier
Aircraft: N562AS
Make and model: Boeing 737890
Aircraft serial: 35091
Aircraft time: 29,277 hours, 8,743 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29603
Condition: Out Of Tolerance
Location: Nr 1 Engine
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

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

What was found

DIAGNOSTICS REPORTS NR 1 ENGINE TREND DATA SHOWS A SHIFT IN DELTA CRUISE AND TAKEOFF MARGIN INDICATIVE OF EGT INDICATION ERRORS. ACFT GROUNDED. FOUND S4 READING HIGH, REPLACED TOP LT T49.5 PROBE REF MM 77-21-01-400-801-F00, OPS NORMAL, REF MM 71-00-00-800-811-F00, TASK 71-00-00-700-808-F00.