SDR ASAA2012062492420

Service difficulty report · Connector · Boeing 737890

Difficulty date: June 2, 2012
Submitted: June 26, 2012
Operation: Air carrier
Aircraft: N538AS
Make and model: Boeing 737890
Aircraft serial: 41188
Aircraft time: 299 hours, 100 cycles
Engine: Cfmint CFM567B27
System (JASC): 7797 · Engine Indicating System Wiring
Part: Connector
Condition: Dirty
Location: N2 Speed Sensor
Part time: 299 hours, 100 cycles
Stage of operation: IN
How discovered: 9
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 2 ENGINE FAULT CODE 77-11132, THE N2 SPEED SENSOR SIGNALS DISAGREE, (SHORT TIME FAULT) APPEARED ON CDU. ACFT GROUNDED. CLEANED CONNECTIONS DP1201, DP0503, DP0603 IAW WDM 77-12-21. INSPECTED, CLEANED, & REASSEMBLED CONNECTORS REF SWPM 20-60-00. OPS CHECKED NORMAL IAW FIM 77-11-00-810-803-F00.