SDR ASAA2014012712486

Service difficulty report · Wire Harness · Boeing 737890

Difficulty date: January 27, 2014
Submitted: January 27, 2014
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 26,242 hours, 7,870 cycles
Engine: Cfmint CFM567B27
System (JASC): 7397 · Engine Fuel System Wiring
Part: Wire Harness
Part number: 3250455010
Condition: Damaged
Location: Nr 2 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 2 ENGINE TREND DATA SHOWS A SHIFT IN DELTA CRUISE AND TAKE-OFF MARGIN INDICATIVE OF EGT INDICATION ERRORS, ETOPS SIGNIFICANT SYSTEM. ACFT GROUNDED. ACCOMPLISHED T49.5 PROBE AND EGT SYSTEM, INSPECTION IAW MM 77-21-01, FOUND CJ9 HARNESS INSULATION RESISTANCE BELOW LIMITS. REMOVED, REPLACED, AND TESTED CJ9 HARNESS, NR 2 ENGINE IAW MM 73-21-06. TEST PASSED.