# SDR SWAA2023031003240

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2023
- Submitted: March 10, 2023
- Operation: Air carrier
- Aircraft: [N289CT](https://openairdocs.org/aircraft/N289CT), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36633
- Aircraft time: 50,940 hours, 30,659 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Debonded
- Location: Zn 100 Fus Lower
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023031003240

## Discrepancy

TAIL CONE SKIN HAS A DISBOND AT BS 1156+13.5' AND 7' LOWER FROM TAIL CONE ACCESS DOOR CUT OUT SKIN LOWER EDGE<[01] IDENTIFIED TAIL CONE IAW SRM 53-80-70-0I-1 FIGURE 2 TABLE 2 ITEM 1<BR><BR>DAMAGE EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM 53-80-70-1A-1 PAR.4 B(4)<BR><BR>DAMAGE TO BE REPAIRED IAW SRM 51-70-04-2R-4 AS DIRECTED BY SRM 53-80-70-2R-1 PAR.4 B(1) TABLE 201 <BR><BR>REMOVED DAMAGE TO BOTH SKINS AND FULL DEPTH HONEYCOMB CORE MEASURING 1.5'DIA; CLEANED SURROUNDING AREA; WITH NO CONTAMINATION NOTED IAW SRM 51-70-04-2R-4 PAR.4 A-C;[02] VALIDATED APPLICABILITY OF REPAIR TO BE COMPLETED IAW SRM 51-70-04-2R-4.;[03] VERIFIED CORRECTIVE CTION 1 AND 2.;[04] FABRICATED REPAIR PLIES FOR THE INNER SURFACE FROM BMS9-3 ST1581 LOT# 1495277-1. FABRICATED CORE PLUG FROM BMS8-124 CL4 TY5 GR3 LOT# 1052601. INSTALLED REPAIR PLIES ON INNER SURFACE USING BMS8-301 CL1 GR1 LOT# JH2EAA8895; AND INSTALLED THE CORE PLUG USING BMS5-28 TY7 LOT# AK1AP8072K. VACUUM BAGGED INNER SURFACE PLIES WITH CORE PLUG. LEAK CHECKED BAGGED GOOD USING VACUUM GAUGE ID: E11543 CAL DUE: 09/2023 AND SET INNER SURFACE AND CORE PLUG TO CURE IAW SRM 51-70-04-2R-4 PARAGRAPH 4.D-F.;

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.