N591AK — SIKORSKY S-76B Aircraft Profile

N591AK

SIKORSKY S-76B

WALNUT, CA

Mfr Year: 1989

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Registrant

UNICAL AVIATION INC

Registration Exp

Sep 30, 2022

Airworthiness Date

Apr 26, 1989

Cert Issue Date

Sep 18, 2019

Seats

Engines

Cruise Speed

0 kts

Max Weight

CLASS 1

Engine Type

Turbo-shaft

Aircraft Type

Rotorcraft

Fractional

Last Activity

Mar 29, 2021

🛠️ Airworthiness Directive Exposure & Fleet Context

This SIKORSKY S-76B airframe/engine combination has 35 current type-applicable Airworthiness Directives (37 airframe, 2 engine) and 4 historical. AD applicability is type-based — compliance status for N591AK must be verified against the aircraft maintenance logbooks.

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N591AK is one of 51 SIKORSKY S-76B aircraft on the U.S. registry · fleet median year 1989.

⚠️ NTSB Accident & Incident Records

No NTSB accident or incident records found for N591AK in the NTSB aviation accident database.

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External Research Links

Airworthiness Directives (ADs)

Search FAA DRS for ADs — filter by Model: S-76B

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Title & Lien History

Bills of sale, liens & security agreements — search N591AK (free FAA account)

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NTSB Full Database

Deep search NTSB CAROL — enter N591AK in Registration Number

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Aviation Weather

METAR, TAF, winds aloft & radar — official FAA weather service

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FAA Registry (Official)

Official FAA record for N591AK — authoritative government source

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Data sourced from FAA Aircraft Registry · Updated daily · Look up another N-Number