# SDR QXEA9700733

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N490US
- Make and model: Fokker F.28 MK4000
- Registry model: [Fokker F.28 MK4000](https://openairdocs.org/model/fokker-f-28-mk4000) (OpenAirDocs)
- Aircraft serial: 11152
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Blkhd Doubler
- Condition: Cracked
- Location: Aft Press Blkhd
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA9700733

## Discrepancy

PDX- REPAIR DOUBLER HAS A CRACK THROUGH THE HI- LOK ON THE NR 2 BEAM OF THE REAR PRESSURE BULKHEAD BETWEEN BL 425L AND BL 1050L AT STRINGER NR 10 CONNECTION ANGLE.  REMOVED DOUBLER, FABRICATED AND INSTALLED NEW DOUBLER IAW FOKKER SRM 51-11-4 AND 51-31-01.

---
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.