Service difficulty report · Antenna · Boeing 737823

Difficulty date
August 29, 2019
Submitted
September 2, 2019
Operation
Air carrier
Aircraft
N877NN
Make and model
Boeing 737823
Aircraft serial
31131
Aircraft time
25,171 hours, 10,238 cycles
Part
Antenna
Part number
S67200218
Condition
Faulty
Location
Zone 100
Stage of operation
AP
How discovered
O
Nature of condition
J
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT WAS GROUNDED: PILOT REPORTS ON FINAL APPROACH WITH COUPLED ILS IN COMMAND B , CAPTAINS FO BARS DISAPPEARED AND BOTH FD MASTER LIGHTS CAME ON. MAINTENANCE TROUBLESHOT IAW FIM TASK 22-11-00-810-801; FOUND MULTIPLE INSTANCES OF FAULT CODE 22-11051, NO RADIO ALT DATA (#1), IN HISTORY. RAD. ALT. OPERATIONAL TEST PASSED IAW AMM 34-33-00. REPLACED BOTH #1 LRRA ANTENNAS IAW AMM 34-33-11. OPS CHECK GOOD.