SDR ASAA2023072144157

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: July 21, 2023
Submitted: July 24, 2023
Operation: Air carrier
Aircraft: N419AS
Make and model: Boeing 737990ER
Aircraft serial: 41734
Aircraft time: 38,500 hours, 12,187 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Unknown
Part number: UNKNOWN
Condition: Unknown
Location: Unknown
Stage of operation: IN
How discovered: V
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

#2 ENGINE EGT SYSTEM FAILS ACCURACY CHECK REF AMM 77-21-00/201. INITIAL READINGS #2 ENGINE EGT S1 77.90 S2 37.78 S3 52.97 S4 92.29. GROUNDED - YES. ACCOMPLISHED #2 ENGINE EGT CLEANING AMM 77-21-00-140-801 REF LP 60520567 FOR PLT DEFERRAL RECHECK. NUMBERS BEFORE CLEANINGS1=62.15 S2=28.94 S3=45.14 S4=66.73NUMBERS AFTER CLEANINGS1=48.79 S2=25.86 S3=25.47 S4=48.28GROUND VERIFICATION PASS SEAMC PETER NOTIFIED.