Service difficulty report · Hmu · Boeing 737890

Difficulty date
February 24, 2010
Submitted
March 1, 2010
Operation
Air carrier
Aircraft
N579AS
Make and model
Boeing 737890
Aircraft serial
35187
Aircraft time
11,392 hours, 3,384 cycles
Engine
Cfmint CFM567B272
Part
Hmu
Part number
1853M56P12
Part serial
BECW1591
Condition
Malfunctioned
Location
Nr 2 Engine
Part time
31,050 hours, 12,484 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

NR 2 ENGINE FAILS ACTUATORS TEST FAULT CODE 73 20342 FMV SIGNAL OUT OF RANGE. REMOVED AND REPLACED NR 2 ENG HMU IAW AMM 73 21 10 000 801 F00 AND 73 21 10 400 801 F00 IDLE LEAK CHECKS OK IAW TEST 3A. AMM 71 00 00 700 801 F00 AND BITE TEST 71 00 00 700 808 F00 AND TEST 12 ACTUATORS TEST IAW 71 00 00 700 807 700.