Service difficulty report · Tee Angle · Boeing 75724APF

Difficulty date
January 12, 2026
Submitted
February 3, 2026
Operation
Air carrier
Aircraft
N411UP
Make and model
Boeing 75724APF
Aircraft serial
23851
Aircraft time
39,473 hours, 26,446 cycles
Part
Tee Angle
Part number
149N77344
Condition
Corroded
Location
Zone 100
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

WING TO BODY FAIRING STRUCTURE LOWER T-CHORD EXFOLIATED AND WITH MULTIPLE SPOTS OF HEAVY CORROSION FROM BS 1180 TO 1240 AT RBL 57.50. DOT 21-40. EVALUATED TEE FITTING BETWEEN STA 1180-1240 AT RBL 57.5 AND FOUND TO BE EXFLOIATED WITH 100% MATERIAL LOSS AND IS THEREFORE OUT OF LIMITS PER SRM 53-00-71-1A-1. INSTALLED 1 TEE FITTING+ 5 GAP PANELS IAW SRM 51-10-42.

More about the Boeing 757-24APF