SDR SWAA2022021872268

Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date: August 27, 2018
Submitted: February 21, 2022
Operation: Air carrier
Aircraft: N720WN
Make and model: Boeing 7377H4
Aircraft serial: 27854
Aircraft time: 70,430 hours, 41,810 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Intercostal
Condition: Corroded
Location: Aft Cargo Compt
Stage of operation: IN
How discovered: 9
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

AFT CARGO BAY INTERCOSTAL STA.907 TO STA.927 LBL 21 HAS CORROSION AT 2 EACH FASTNERS / MARKED / REMOVED CORROSION AT STA 907 TO 927 LBL 21 IAW SRM 53-00-53-1A-2 FIG 12 SHEET 1. VERIFIED MATERIAL LIMITS. REMOVED .016' REMAINING .055' ORIG. MAT. .071'. FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2. REMOVED AND REPLACED INTERCOSTAL AT STA 907 TO 927 LBL21 IAW SRM 51-40-02-0G-0; 51-40-05-0G-0 & DWG 147A7401 REV C. APPLIED CIC IAW 737-700 AMM 51-21-91-620-802

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