Service difficulty report · Fitting · Boeing 737823

Difficulty date
October 24, 2026
Submitted
October 27, 2026
Operation
Air carrier
Aircraft
N929AN
Make and model
Boeing 737823
Aircraft serial
30078
Aircraft time
70,768 hours, 30,123 cycles
Part
Fitting
Part number
172A21011
Condition
Corroded
Location
Zone 300
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

AIRCRAFT IN BASE MAINTENANCE: FOUND CORROSION AROUND BOLT HOLE IN VERTICAL FIN FRONT SPAR FITTING ON LH SIDE AFT AND FWD FACE. CORROSION DAMAGE WAS REMOVED BY BLENDING IAW B373-NG SRM 55-30-90-1A PROCEDURE 1 ALLOWABLE DAMAGE 1. VERTICAL STABILIZER FITTINGS.