Service difficulty report · Thermocouple · Doug MD1030F

Difficulty date
October 7, 2017
Submitted
October 10, 2017
Operation
Air carrier
Aircraft
N315FE
Make and model
Doug MD1030F
Aircraft serial
48313
Aircraft time
62,674 hours, 21,352 cycles
Part
Thermocouple
Condition
Malfunctioned
Location
Egt
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

DURING CLIMBOUT, RECEIVED A LEVEL 1 NR 2 ENGINE EXCEDENCE. NR 2 EGT MOMENTARY BETWEEN 800-900, PULLED NR 2 THROTTLE TO IDLE, EGT DECREASED TO NORMAL. EGT NEEDLE JUMPED WIDELY THROUGH FULL RANGE OF EGT & X INDICATION FOR 30 SECONDS. GAUGE REACHED 1055 DURING RAPID NEEDLE MOVEMENT AFTER PULLING TO FLIGHT IDLE GAUGE APPEARED NORMAL, READ 100 DEGREES HOTTER THAN NR 1 AND NR 3 EGT ON GROUND. ACCOMPLISHED AN EGT RESISTANCE CHECK IAW EO 8-7257-7-5004, PT 3, AND AMM 77-21-01-2. FOUND SOME MARGINAL READINGS ON HARNESSES, R & R ALL EGT THERMOCOUPLE HARNESSES IAW AMM 77-21-01-2-0, R & R EGT THERMOCOUPLE LEADS IAW AMM 77-21-02-2. RAN NR 2 AND 3 ENGINES IAW JRH, NO FLUCTUATIONS IN EGT , OPS CHECKED GOOD.

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