# N6638R: Hughes OH-6A, registration cancelled 2005-02-16

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 16, 2005
- Status when cancelled: Triennial form not returned
- Airframe: [Hughes OH-6A](https://openairdocs.org/model/hughes-oh-6a) (registry code 4470905)
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE) (OpenAirDocs)
- Serial number: 67-16198
- Type of aircraft: Rotorcraft
- Certificate issued: April 9, 1992
- Last registry action: May 14, 2002
- Mode S code: A8C2DE
- Owner when cancelled: [United States Border Patrol Air Operations](https://openairdocs.org/faa-owner/UNITED%20STATES%20BORDER%20PATROL%20AIR%20OPERATIONS)
- Location: [El Paso, TX](https://openairdocs.org/faa-place/TX/El%20Paso)
- Owner type: Government
- Owner's area on the map: 31.8090° N, 106.4195° W: Placed by OpenAirDocs at the center of ZIP code 79906, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N6638R
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=6638R
- Page: https://openairdocs.org/deregistered/N6638R-2005-02-16

From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Hughes OH-6A: https://openairdocs.org/model/hughes-oh-6a.md

## Service difficulty reports (1)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 98ZZZX1880](https://openairdocs.org/sdr/98ZZZX1880), Apr 2, 1998: DAMPENER SUPPORT. CRACKED. DURING A 300-HOUR INSPECTION, A CRACK WAS NOTICED ON THE TAIL ROTOR DRIVE SHAFT DAMPENER SUPPORT. AFTER REMOVING TAIL BOOM, THE CRACK WAS ABOUT .75 INCHES LONG 

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB FTW99GA061](https://openairdocs.org/ntsb/FTW99GA061), Dec 27, 1998: Hughes OH-6A (N6638R), Laredo, TX, substantial damage. Probable cause: The loss of engine power as result of the failure of the power turbine governor. A factor was the lack of suitable terrain available to the pilot for the forced landing.

## Other aircraft with N6638R

- [Cancelled 1989-03-01](https://openairdocs.org/deregistered/N6638R-1989-03-01): Beech C23, S/N M2221. N-number assigned, not yet registered

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