SDR SWAA2020032442796

Service difficulty report · Intercostal · Boeing 7377AD

Difficulty date: March 3, 2020
Submitted: March 24, 2020
Operation: Air carrier
Aircraft: N798SW
Make and model: Boeing 7377AD
Aircraft serial: 28436
Aircraft time: 69,451 hours, 41,534 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Part number: 147A5730
Condition: Corroded
Location: Fuselage
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

CORROSION ON FLOOR INTERCOASTAL AT BS 989 RBL 38 . WL 208 REMOVED CORROSION ON FLOOR INTERCOSTAL B.S 989 RBL 38 WL 208 2" X 1.5" X .015"D REMAINING THICKNESS 065", ORIGINAL THICKNESS .080" FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1 PAR 4A(2) FIG 103. REMOVED AND REPLACED FLOOR INTERCOSTAL B.S 986-1006 RBL 38 PER SRM 51-40-02-0G-0, DWG 147A5730, REV C.

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