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Aircraft record

N51AG1971 Bell UH-1H

Registration validUnclaimedSource: FAA, updated Oct 18, 2026

Safety record in brief:No NTSB accidents or incidents since 19828 ADs may apply21 service difficulty reports

Registration
Valid
expires Dec 31, 2027
Based in
Pensacola, FL
owner city / state
Engine
UNKNOWN ENG
Ama/Expr
Owners
1
since 2014
NTSB events
None
since 1982
ADs may apply
8
confirm with A&P
Service reports
21
since 1995

Registration

FAA Aircraft Registry · Oct 18, 2026
Registered owner
Brown Helicopter INC
Owner type
Corporation
City, state
Pensacola, FL
Certificate issued
Dec 11, 2014
Expires
Dec 31, 2027
Airworthiness
Restricted · Agriculture and Pest Control, Forest, Other
Airworthiness date
Jul 17, 1997

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 data

Airframe

Manufacturer
Bell
Model
UH-1H
Year
1971
Serial number
71-20178
Aircraft type
Rotorcraft
Category
Land
Certification
Type Certificated
Seats
15
Engines
1
Max takeoff weight
Up to 12,499 lb
Mode S code
A65F1D

Engine

Make and model
Ama/Expr Unknown Eng
Type
Turbo-shaft

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records
  1. 2014 – nowBrown Helicopter INCPensacola, FL · current

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 18, 2026 · SDRs · Oct 16, 2026

NTSB events (0)

No NTSB accidents or incidents found for this airframe since 1982.

Accident history for this model

ADs published since 1998 that may apply (8)

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.

ADSubjectEffectiveApplies to
2014-03-10Various Restricted Category HelicoptersMar 26, 2014Airframe (UH-1H)Only with: Restricted category helicopters with cable assembly part number 205-001-720-001 installed.
2002-20-01Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P; and…Nov 6, 2002Airframe (UH-1H)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.
2002-13-51Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P; and…Aug 19, 2002Airframe (UH-1H)Only with: Tail rotor grip P/N 205-011-711-101 installed; helicopters manufactured by Bell for the U.S. Armed Forces.
2002-01-31Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, UH-1P, and…Feb 1, 2002Airframe (UH-1H)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.
2000-15-21 R1Bell Helicopter Textron Inc.-Manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B…Nov 7, 2000Airframe (UH-1H)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.
Show all 8 ADs
ADSubjectEffectiveApplies to
2000-15-21Bell Helicopter Textron Inc.-Manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B…Aug 9, 2000Airframe (UH-1H)Only with: Main rotor mast assembly P/N 205-011-450-001 or -005 installed.
99-07-15Bell Helicopter Textron, Inc.- manufactured Model HH-1K, SW204, SW204HP, SW205…May 3, 1999Airframe (UH-1H)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.
97-20-09Bell Helicopter Textron (Bell)- manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B…May 28, 1998Airframe (UH-1H)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 (21)

Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.

  • Fuselage · skin · crackedJun 6, 2003

    THE TAILBOOM FIRST 2 UPPER SKINS HAD NUMEROUS CRACKS. UNDER NORMAL OPERATIONS THESE CRACKS WOULD NEVER MATERIALIZE. THE AIRCRAFT HAS BEEN DOING LIFTING WORK. MUCH MORE THAN NORMAL OPERATIONS. THIS LOADS AND UNLOADS THE TAILBOOM NUMEROUS TIMES. THE RESULTING CRACKS ARE DUE TO THE FATIGUE ON THE…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Electrical power · battery · weakJul 20, 2001

    PART IS WEAK.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Flight controls · cable drum · stretchedApr 10, 2001

    CABLE DRUM STRETCHED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
Show all 10 reports
  • Tail rotor drive · bearing · roughFeb 29, 2000

    BEARING EXTREMELY ROUGH, AND RATCHETY.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Navigation · indicator · malfunctionedSep 8, 1999

    INDICATING FALSE AIRSPEED. SLOW TO CHANGE INDICATION. REMOVED AND REPLACED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Navigation · indicator · malfunctionedSep 8, 1999

    INDICATING FALSE AIRSPEED, SLOW TO CHANGE INDICATION. REMOVED AND REPLACED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Main rotor drive · switch · malfunctionedSep 8, 1999

    TRANSMISSION OIL HOT LIGHT COMES ON INTERMITTENTLY WITH TEMPERATURE IN GREEN. REMOVED AND REPLACED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuel · pump · malfunctionedSep 7, 1999

    HEARD NOISE FROM LEFT FUEL CELL. CHECKED PRESSURE ON BOOST PUMP, FOUND TO BE LOW. REMOVED AND REPLACED PUMP.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Indicating and recording systems · caution panel · malfunctionedJul 9, 1999

    TRANSMISSION OIL HOT LIGHT CAME ON, TEMPERATURE GAUGE IS NORMAL. REMOVED AND REPLACED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Landing gear · skid tube · dentedJun 10, 1999

    SKID TUBE DENTED. REMOVED AND REPLACED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.

Showing the 10 most recent of 21 reports.

Related aircraft

Show all 8 related aircraft
All 294 registered Bell UH-1H aircraft

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

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