SDR CALA2026090919315

Service difficulty report · Web · Boeing 737824

Difficulty date: August 26, 2026
Submitted: September 9, 2026
Operation: Air carrier
Aircraft: N78540
Make and model: Boeing 737824
Aircraft serial: 63646
Aircraft time: 27,628 hours, 10,398 cycles
Engine: Cfmint CFM567B27
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Part number: 654A000358
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

FWD CARGO, LOWER MAIN SILL WEB HAD TWO POINTS OF POSSIBLE CORROSION. REMOVED THE FWD CARGO LOWER MAIN SILL WEB, LOCATED, DRILLED, COUNTERSANK, APPLIED ALODINE, PRIMER, INSTALLED NUTPLATES AND INSTALLED NEW WEB IAW SRM 53-30-15-1A-1, SRM 51-10-02-0G-0, SRM 51-40-02-0G-0, SRM 51-40-05-0G-0, SRM 51-40-08-0G-0, SRM 51-20-01-0G-0, AMM 51-21-72-370-804, & DWG 143A8122, REV. D.