Accident · substantial damage
Jun 21, 1990 · Yakima, WA- Damage
- Substantial
- Injuries
- None
- Report
- SEA90TL#03
From NTSB records; matched by serial number.Read NTSB report (search CAROL for SEA90TL#03)
N99634Bell UH-1B
DeregisteredUnclaimedSource: FAA, updated Oct 18, 2026
This N-number isn't registered right now. Below is its last known registration, canceled May 31, 2013.
Safety record in brief:1 NTSB accident (substantial damage, Jun 1990)9 ADs may apply
- Registration
- Deregistered
Registration
FAA Aircraft Registry · Oct 18, 2026- Last registered owner
- Partnership
- City, state
- Ft Klamath, OR
- Certificate issued
- Mar 5, 1986
- Canceled
- May 31, 2013
- Airworthiness
- Experimental · To show compliance with FAR
- Airworthiness date
- May 3, 1990
We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.
Airframe & engine
FAA Registry + type dataAirframe
- Manufacturer
- Bell
- Model
- UH-1B
- Serial number
- 63-8646
- Aircraft type
- Rotorcraft
- Category
- Land
- Certification
- Not Type Certificated
- Seats
- 6
- Engines
- 1
- Max takeoff weight
- Up to 12,499 lb
- Mode S code
- ADEBCB
Engine
- Make and model
- Lycoming T-53 Series
- Type
- Turbo-shaft
- Power
- 1150 hp
Total time and engine hours aren't public. They appear here once the owner adds logbooks.
Ownership history
Ownership history from FAA records- 1986 – 2013PartnershipFt Klamath, OR
Individual owners are shown by city and state only.
Safety record
NTSB · Oct 15, 2026 · FAA ADs · Oct 18, 2026 · SDRs · Oct 16, 2026NTSB events (1)
ADs published since 1998 that may apply (9)
These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
| AD | Subject | Effective | Applies to |
|---|---|---|---|
| 2014-03-10 | Various Restricted Category Helicopters | Mar 26, 2014 | Airframe (UH-1B)Only with: Restricted category helicopters with cable assembly part number 205-001-720-001 installed. |
| 2002-20-01 | Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P; and… | Nov 6, 2002 | Airframe (UH-1B)Only with: Main rotor tension-torsion strap P/N 204-012-122-1, 204-012-122-5, 2601399, or 2606650 installed; manufactured by BHTI for the US Armed Forces. |
| 2002-15-04 | Honeywell International, Inc., (formerly AlliedSignal, Inc. and Textron Lycoming)… | Sep 10, 2002 | Engine (T-53 SERIES)Only with: Engines with centrifugal compressor impellers having serial numbers 83317, 83327, 83328, or 83330 installed. |
| 2002-13-51 | Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P; and… | Aug 19, 2002 | Airframe (UH-1B)Only with: Tail rotor grip P/N 205-011-711-101 installed; helicopters manufactured by Bell for the U.S. Armed Forces. |
| 2002-01-31 | Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, UH-1P, and… | Feb 1, 2002 | Airframe (UH-1B)Only with: Manufactured for the U.S. Armed Forces, with main rotor mast P/N 204-011-450-007, -105, or -109, or main rotor trunnion P/N 204-011-105-001 installed. |
Show all 9 ADsShow fewer ADs
| AD | Subject | Effective | Applies to |
|---|---|---|---|
| 2000-15-21 R1 | Bell Helicopter Textron Inc.-Manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B… | Nov 7, 2000 | Airframe (UH-1B)Only with: Manufactured by BHTI for the U.S. Armed Forces, with main rotor mast assembly P/N 204-011-450-001 or -005 installed. |
| 2000-15-21 | Bell Helicopter Textron Inc.-Manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B… | Aug 9, 2000 | Airframe (UH-1B)Only with: Main rotor mast assembly P/N 205-011-450-001 or -005 installed. |
| 99-07-15 | Bell Helicopter Textron, Inc.- manufactured Model HH-1K, SW204, SW204HP, SW205… | May 3, 1999 | Airframe (UH-1B)Only with: Tail rotor yoke P/N 212-011-702 (all dash numbers), P/N 212-010-704 (all dash numbers), or P/N 212-010-744 (all dash numbers) installed. |
| 97-20-09 | Bell Helicopter Textron (Bell)- manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B… | May 28, 1998 | Airframe (UH-1B)Only with: Tailboom vertical fin spar P/N 205-032-899, 205-030-846, or 205-032-851, all dash numbers, installed. |
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
Service Difficulty Reports (0)
No Service Difficulty Reports found for this airframe since 1995.
Sources
- FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 18, 2026
- NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
- FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 18, 2026
- FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026