# SDR ASAA2021100136241

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 2021
- Submitted: October 12, 2021
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 56,562 hours, 16,444 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Transition Panel
- Part number: 143A7501184
- Condition: Corroded
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021100136241

## Discrepancy

FWD PIT RH TRANSITION PANEL HAS CORROSION ON UPPER SURFACE ST STA 419, RBL 24(MARKED). DOT:P465. GROUNDED - YES. REMOVED CORROSION FROM R/H TRANSITION PANEL ON STA 419 IAW B737-800 SRM 53-00-53-1A-2. ORIGINAL THICKNESS IS 0.040 REMOVED 0.018 REMAINING THICKNESS 0.022. FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2-4.A.(2) TOOL T8224K DUE DATE 13/OCT/21. REMOVED DANAGED SECTION FROM STA 410 TO 420 IAW B737-800 SRM 53-00-53-2R-5.4.B MATERIAL ID FOR SPLICE AND ZEE CHANEL PN # BAC1496-444 7075-T6 PO: 883991.1 IAW B737-800 SRM 53-00-53-2R-5.4.D TABLE 201.FABRICATED REPAIR PARTS IAW B737-800 SRM 53-00-53-2R-5.4.D THRU H ALODINED IAW 53-00-53-2R-5.4.I APPLIED PRIMER IAW 53-00-53-2R-5.4.J INSTALLED REPAIR PARTS IAW B737-800 SRM 53-00-53-2R-5.4.L.(1).(2).(3) INSTALLED NUTPLATES IAW B737-800 SRM 53-00-53-2R-5.4.K APPLIED CIC IAW B737-800 SRM 53-00-53-2R-5.4.NDOT REMOVED.

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