SDR ASAA12511650

Service difficulty report · Connector · Boeing 737890

Difficulty date: June 3, 2012
Submitted: July 24, 2012
Operation: Air carrier
Aircraft: N565AS
Make and model: Boeing 737890
Aircraft serial: 35181
Aircraft time: 21,144 hours, 6,558 cycles
System (JASC): 7797 · Engine Indicating System Wiring
Part: Connector
Condition: Dirty
Location: Nr 1 Egt
Stage of operation: IN
How discovered: V
Nature of condition: N
Precautionary procedure: K

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

What was found

NR 1 ENG BOTTOM RT EGT SIGNAL (T495S2) IS OUT OF RANGE. ACCOMPLISHED T49.5 PROBE AND EGT SYS INSPECTION IAW MM 77-21-01-200-801-F00. FOUND SLIGHTLY HIGH RESISTANCE BETWEEN PIN H AND PIN LOWER CASE A OF 15.6 OHMS ON CONNECTOR J9 DP0909. CLEANED CONNECTOR REF MM 70-70-01, SUBSEQUENT READING OF 5.95 OHMS AFTER CLEANING IS WITHIN LIMITS. ALL INSULATION RESISTANCE VALUES WITHIN LIMITS.