Service difficulty report · Drive Unit · Boeing 737924ER

Difficulty date
March 23, 2025
Submitted
March 26, 2025
Operation
Air carrier
Aircraft
N37471
Make and model
Boeing 737924ER
Aircraft serial
37102
Aircraft time
38,231 hours, 13,726 cycles
Part
Drive Unit
Part number
6225135802
Part serial
445R9M
Condition
Faulty
Location
Zone 100
Part time
28,914 hours, 10,447 cycles
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

PWS FAIL WXR FAIL ANT DURING FLIGHT PERFORMED ECRA 3440-02600, DOWNLOAD OF RT SHOWS SEVERAL LEGS FOR ANTENNA FAULT. ALSO SEE LOG 4262785. REQUIRES ANT DRIVE UNIT REPLACEMENT PER AMM 34-43-11 FOLLOWED FIM TASK 34-43 TASK 815. TEST PASSED. DUE TO CHRONIC ISSUE AS A PRECAUTIONARY R&R TRANSMITTER RECEIVER IAW AMM 34-43-41-400-801. COMPLETED WXR OPERATIONAL TEST IAW AMM 34-43-00-710-802-001. TEST PASSED. TECH SUPPORT RECOMMENDS REPLACING ANTENNA. REMOVED AND REPLACED WXR ANTENNA DRIVE UNIT PER AMM 34-43-11. OPS CHECK GOOD.