Service difficulty report · Sensor · Boeing 737990ER

Difficulty date
January 23, 2013
Submitted
January 29, 2013
Operation
Air carrier
Aircraft
N403AS
Make and model
Boeing 737990ER
Aircraft serial
41730
Aircraft time
743 hours, 271 cycles
Part
Sensor
Part number
3205490040
Condition
Malfunctioned
Location
Nr 1 Engine
Stage of operation
IN
How discovered
V
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

DIAGNOSTIC REPORTS NR 1 ENG VIBRATION INTERMITTENT. ACCOMPLISHED RESISTANCE CHECKS IAW FIM TASK 77-31-805, PARA E (1).-(3). NO DEFECTS NOTED. REINSTALLED AVM. OPS TEST NORMAL REF MM 77-31-03. REF STEP 3. PRECAUTIONARY R & R NR 1 ENGINE N2 SPEED SENSOR. REF MM 77-11-02. NO LEAKS NOTED, EEC BITE TEST PASSED REF MM 71-00-00. COMPLETED AVM SYS -OPS TEST TASK 77-31-00-710-801-F00 STEPS (5)-(7),(9)-(12) NO DEFECTS NOTED, ENG RUN NORMAL.