SDR 2000ZZZX77

Service difficulty report · Thermocouple · Cessna 172S

Difficulty date: December 16, 1999
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N494SP
Make and model: Cessna 172S
Aircraft serial: 172S8035
System (JASC): 7722 · Engine EGT/TIT Indicating System
Part: Thermocouple
Part number: TE4099802
Condition: Inoperative
Location: Engine
Part time: 93 hours
Stage of operation: NR
Nature of condition: N
Precautionary procedure: O

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

What was found

PILOT DISCREPANCY, EGT INOPERATIVE. DURING PHASE 3 INSPECTION, FOUND THERMOCOUPLE LEADS SEPARATED FROM THERMOCOUPLE. REPLACED EGT THERMOCOUPLE, OPERATIONAL CHECK SATISFACTORY. SUBMITTER STATED ON A FLEET OF 5 NEW C-172S AIRCRAFT, THIS IS THE 10TH FAILURE IN THE PAST YEAR.

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