# SDR 2001F00246

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2001
- Submitted: August 28, 2001
- Operation: Air carrier
- Aircraft: [N231TA](https://openairdocs.org/aircraft/N231TA), registered now
- Make and model: Boeing 737-2K5
- Registry model: [Boeing 737-2K5](https://openairdocs.org/model/boeing-737-2k5) (OpenAirDocs)
- Aircraft serial: 22596
- System (JASC): [3234 · Landing Gear Selector](https://openairdocs.org/jasc/3234)
- Part: Selector Valve
- Part number: 4105DA
- Part serial: 405
- Condition: Defective
- Location: Mlg Ww
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2001F00246

## Discrepancy

SAP - FLT 220 - DURING CLIMB, LEFT AND RIGHT MLG DID NOT SECURE IN UPLOCK POSITION.  THE AIRCRAFT RETURNED TO SAP FOR MX.  A FERRY FLT PERMIT WAS GRANTED.  AFTER LANDING AT EL SALVADOR, MX TECHS PERFORMED RETRACTION AND EXTENSION OF THE LANDING GEARS AS PER AMM 32-32.  FOUND INCORRECT OPERATION OF THE SELECTOR VALVE.  THE UNIT WAS REPLACED AND TESTED AS PER AMM 32-31-51.  ALSO, THE FILTER ELEMENTS OF THE MODULAR PACKAGES 'A' AND 'B' WERE REPLACED AS PER AMM 29-11-71 AND AMM 29-12-41.  LANDING GEARS RETRACTION AND EXTENSION WERE PERFORMED ON GROUND AS PER AMM 32-32.  NORMAL RESULTS WERE OBSERVED.  TEST FLIGHT WAS PERFORMED.  THE LANDING GEAR RETRACTION AND EXTENSION SYSTEM SHOWED NORMAL.  THE AIRCRAFT RETURNED T

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