Service difficulty report · Printed Ckt Board · Boeing 75729J

Difficulty date
April 27, 2020
Submitted
April 29, 2020
Operation
Air carrier
Aircraft
N757QM
Make and model
Boeing 75729J
Aircraft serial
27203
Aircraft time
59,222 hours, 32,350 cycles
Engine
Pwa PW2037
Engine time
47,614 hours, 21,396 cycles
Part
Printed Ckt Board
Part number
644501
Part serial
12092
Condition
Unserviceable
Location
Fire Warning
Stage of operation
UK
How discovered
O
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

R ENG FIRE LP 1 EICAS MESSAGE. TROUBLESHOT PER FIM 26-11 FAULT TREE 802. PERFORMED FIRE LOOPS RESISTANCE CHECK PER TABLE 101 ALL CHECK WITHIN LIMITS. PROBLEM ISOLATED TO FIRE CONTROL PRINTED CARD M683. REMOVED AND REPLACED, PERFORMED ENG/APU/CARGO FIRE TEST SATISFACTORY.

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