What was found
WHILE PERFORMING TASK CARD 78273000, FOUND FAULT CODE 77-20871 THE TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE. ECONOMIC FAULT #1 ENG. GROUNDED - YES. ON DEFERRAL.
- Difficulty date
- October 30, 2023
- Submitted
- November 3, 2023
- Operation
- Air carrier
- Aircraft
- N474AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40715
- Aircraft time
- 31,285 hours, 9,807 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
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.