N520PA

01 /  Registration

Filed with the Federal Aviation Administration

Every cell below is a literal field from the FAA Aircraft Registry. Click any value to open the FAA registry record for N520PA.

02 /  NTSB Records

Events on file with the National Transportation Safety Board

03 /  Airworthiness Directives

Applicable to HUGHES 369D

Federal Aviation Administration airworthiness directives matched to make and model. Each entry links to the Federal Register publication.

• Mar 26, 2013

  Airworthiness Directives; Hughes Helicopters, Inc., and McDonnell Douglas Helicopter Systems (Type Certificate Is Currently Held by MD Helicopters, Inc.) Helicopters

  We are adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model 369D, 369E, 369F, and 369FF helicopters with certain serial-numbered tailboom assemblies. This AD requires measuring the distance between aft longeron rivets and the outboard edge of frame rings. If the distance is too short to ensure a safe flight, the AD requires inst…

  Atlas AD 2013-06746 → Federal Register ↗

• Aug 29, 2012

  Airworthiness Directives; Hughes Helicopters, Inc., and McDonnell Douglas Helicopter Systems (Type Certificate Currently Held by MD Helicopters, Inc.) Helicopters

  We propose to adopt a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model 369D, 369E, 369F, and 369FF helicopters with certain serial-numbered tailboom assemblies. This proposed AD is prompted by the discovery of short-edge margin conditions on two tailboom assemblies. The proposed actions are intended to detect a short-edge margin condit…

  Atlas AD 2012-21277 → Federal Register ↗

• Feb 14, 2001

  Airworthiness Directives; Marathon Power Technologies Company

  This document proposes adopting a new airworthiness directive (AD) for certain nickel cadmium batteries produced by Marathon Power Technologies Company (Marathon). The AD would require visually inspecting screws installed on Marathon batteries and replacing certain unairworthy screws. This proposal is prompted by an explosion of a G.E./Saft battery due to f…

  Atlas AD 01-3673 → Federal Register ↗

• Jan 22, 2001

  Airworthiness Directives; MD Helicopters, Inc. Model 369A, H, HE, HM, HS, D, E, FF, and 500N Helicopters

  This document publishes in the Federal Register an amendment adopting Emergency Airworthiness Directive (AD) 2000-25-52 which was sent previously to all known U.S. owners and operators of MD Helicopters, Inc. (MDHI) Model 369A, H, HE, HM, HS, D, E, FF, and 500N helicopters. This amendment supersedes an existing emergency AD that requires, before further fli…

  Atlas AD 01-1586 → Federal Register ↗

• Nov 28, 1994

  Airworthiness Directives; McDonnell Douglas Helicopter Systems and Hughes Helicopters, Inc. Model 369D, E, F, and FF Series Helicopters

  This amendment adopts a new airworthiness directive (AD) that is applicable to McDonnell Douglas Helicopter Systems and Hughes Helicopters, Inc. Model 369D, E, F, and FF series helicopters. This action requires an initial inspection of the pitch control assembly lockwasher (lockwasher) for dents at the inner tang inside radius, application of a torque strip…

  Atlas AD 94-28938 → Federal Register ↗

• Sep 7, 1994

  Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters

  This amendment supersedes an existing airworthiness directive (AD), applicable to McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM series helicopters, that requires daily preflight checks and 100 hours time-in-service (TIS) inspections for tail rotor blade abrasion strip (abrasion s…

  Atlas AD 94-21906 → Federal Register ↗

04 /  Service Difficulty Reports

FAA SDR filings

The FAA does not currently expose a public API for Service Difficulty Reports. We do not back-fill or paraphrase. Search the FAA SDR portal directly →

05 /  Related

More on Hughes 369D in the Atlas

Hughes 369D type page → — 205 registered · 6 ADs · 110 NTSB records

Search the full US registry → · All airworthiness directives → · Accident & safety surface →

06 /  Sources & Methodology

Every fact on this page links to its primary US-government source

• FAA Aircraft Registry →

  Refreshed May 5, 2026

  Available

• NTSB CAROL →

  Refreshed May 5, 2026

  Available

• Federal Register (FAA Airworthiness Directives) →

  Refreshed May 5, 2026

  Available

• FAA Service Difficulty Reports →

  Refreshed May 5, 2026

  Unavailable

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