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SDR ASAA2012071492549

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Service difficulty report · Eec · Boeing 737890

FAA SDR system

Difficulty date
July 1, 2012
Submitted
July 18, 2012
Operation
Air carrier
Aircraft
N535AS
Make and model
Boeing 737890
Aircraft serial
35200
Aircraft time
5,729 hours, 1,731 cycles
Engine
Cfmint CFM567B273
System (JASC)
7320 · Fuel Controlling System
Part
Eec
Condition
Failed
Location
Nr 1 Engine
Part time
5,739 hours, 1,733 cycles
Stage of operation
IN
How discovered
O
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

FLT LEG 0 AND 1 SHOW FAULT CODE 73-21271 THE ALTERNATOR VOLTAGE INPUT TO THE EEC IS OUT OF RANGE, WHILE PERFORMING EEC BITE CHECK ON NR 1 ENGINE. ACFT GROUNDED. PERFORMED FIM 73-27-00-810-804-F00, FAILED STEP F PARAGRAPH (3), CH B SIDE OF EEC ALTERNATOR OF NR 1 ENG. R & R EEC ALTERNATOR AND ALTERNATOR ROTOR IAW AMM 73-21-08-400-801-F00. REQUIRES TEST 3A & 13 IAW POWERPLANT TEST REF TABLE TASK 71-00-00-800-811-F00 G. ACCOMPLISHED LEAK TEST 3A AND TEST 13 - ENGINE RUN EEC - BITE CHECK. NO LEAKS NOTED ON PAD OR ALT MOUNT. NO FAULTS NOTED FOR FLIGHT 0.