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Type Record · As of May 3, 2026

HILLER H-23B

Rotorcraft · FRANKLIN 6V4 SERIES

Registered

1

Year Range

1942–1942

NTSB Events

0

Airworthiness Directives

1

Aircraft Resources

Engine · Franklin Engine Corp (PZL-Aero) → Search FAA TCDS →

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered HILLER H-23B aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • MN 100.0% 1

By Decade of Manufacture

  • 1940s 100.0% 1

02 /  NTSB Records

Events involving HILLER H-23B aircraft

No NTSB-recorded events match HILLER H-23B in the indexed corpus.

03 /  Airworthiness Directives

FAA directives applicable to HILLER H-23B

1 directive(s) on file. Showing the most recent 1.

  • May 23, 1997

    Airworthiness Directives; Hiller Aircraft Corporation Model UH- 12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, CH-112, H-23A, H-23B, H- 23C, H-23D, H-23F, HTE-1, HTE-2, and OH-23G Helicopters

    This amendment supersedes an existing airworthiness directive (AD), applicable to Hiller Aircraft Corporation Model UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, CH-112, H-23A, H-23B, H-23C, H-23D, H- 23F, HTE-1, HTE-2, and OH-23G helicopters, and UH-12D and UH-12E helicopters converted to turbine engine power in acc…

    Atlas AD → Federal Register ↗

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for HILLER H-23B

Advisory Circulars

ACs whose subject explicitly mentions HILLER or H-23B.

05 /  Aircraft of this type

All 1 registered N-numbers

Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.

1 of 1
N-number St Year NTSB FAA
N4786C MN 1942 · Look up ↗

Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)

05 /  Sources & Methodology

Every count traces back to a primary US-government source

We render counts and lists as the agency publishes them. Read the methodology →