# SDR CALA0600304

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2006
- Submitted: August 22, 2006
- Operation: Air carrier
- Aircraft: N14655
- Make and model: Boeing 737524
- Aircraft serial: 28916
- Aircraft time: 22,647 hours, 11,708 cycles
- System (JASC): [3220 · Nose/Tail Landing Gear](https://openairdocs.org/jasc/3220)
- Part: Drag Brace
- Condition: Failed
- Location: Nlg
- Component: Nlg
- Component part number: 657376221
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA0600304

## Discrepancy

THE NLG COLLAPSED DURING PUSHBACK FROM HANGAR IN EWR.  INITIAL EXAMINATION OF THE GEAR REVEALED THAT THE OVER-CENTER LINK AND DRAG BRACE HAD FAILED AND THERE WAS DAMAGE TO THE NLG DOORS.  THE AIRCRAFT WAS TAKEN OUT OF SERVICE FOR REPAIR.  A DETAILED INVESTIGATION WILL BE CONDUCTED BY ENGINEERING TO DETERMINE THE PRIMARY CAUSE OF FAILURE AND TO IDENTIFY THE RESPONSIBLE PART.  [07-25-07]   LAB CONFIRMED THE INITIAL FAILURE OF THE OVER-CENTER LINK RESULTED IN THE NLG COLLAPSE.

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