# AD 82-14-01: With Chadwick C-20 Auxiliary Fuel System - Type: Airworthiness directive - Status: Current - Products: MD Helicopters 369, 369A, 369D, 369E, 369H, 369HE, 369HM and 369HS with STC SH129WE - Effective: July 30, 1982 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-4402 - Registered aircraft: 496 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F1DDDC6A26B1F2D486256A4E004896F0.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/82-14-01 ## The airworthiness directive 82-14-01 HUGHES: Amendment 39-4402. Applies to the Hughes Model 369 Helicopters with Chadwick C-20 Auxiliary Fuel System installed per Supplemental Type Certification SH129WE. Compliance is required as indicated, to provide early warning of auxiliary fuel transfer pump malfunction and the associated decrease in usable auxiliary fuel. Accomplish the following, unless already accomplished: 1. Within 30 days after the effective date of this AD, install a placard in accordance with Chadwick Service Bulletin 20-81-01 dated October 6, 1981, or FAA approved equivalent limiting usable auxiliary fuel to half the amount in the auxiliary tanks at takeoff. 2. Within 300 hours' time-in-service or 6 months from the effective date of this AD, whichever occurs first, install the C-20-FM Flow Monitoring Kit in accordance with Chadwick Service Bulletin 20-81-01 dated October 6, 1981, or FAA approved equivalent. The placard installed per Item 1 above may be removed, provided the revisedFlight Manual Supplement, Chadwick Auxiliary Fuel System C-20, dated October 21, 1981, is incorporated into the Rotorcraft Flight Manual. 3. Alternate modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region. 4. Special flight permits may be issued in accordance with Federal Aviation Regulation Part 21, Sections 21.197 and 21.199, to operate each helicopter to a base for the accomplishment of the modification required by this AD. This amendment becomes effective July 30, 1982. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H3WE](https://openairdocs.org/tcds/H3WE): MD Helicopters LLC; names 8 of 12 models: 369D, 369E, 369HS, 369HM, 369HE, 369H, 369 (Army YOH-6A), 369A (Army OH-6A) ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 496 (496 by airframe model, 0 by engine model) - Makers: Hughes Helicopters 236, Hughes 121, Mcdonnell Douglas Helicopter 83, MD Helicopters 48, Summa 5, Hughes/Batto John 1, Hughes/Helicopter Assocs 1, Mcdonnell Douglas Mdhs 1 Models with the most aircraft: - [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 207 aircraft (airframe model) - [Mcdonnell Douglas Helicopter 369E](https://openairdocs.org/model/mcdonnell-douglas-helicopter-369e): 83 aircraft (airframe model) - [Hughes 369HS](https://openairdocs.org/model/hughes-369hs): 69 aircraft (airframe model) - [MD Helicopters 369E](https://openairdocs.org/model/md-helicopters-369e): 42 aircraft (airframe model) - [Hughes 369A](https://openairdocs.org/model/hughes-369a): 32 aircraft (airframe model) - [Hughes Helicopters 369E](https://openairdocs.org/model/hughes-helicopters-369e): 29 aircraft (airframe model) - [Hughes 369A (OH-6A)](https://openairdocs.org/model/hughes-369a-oh-6a): 11 aircraft (airframe model) - [Hughes 369](https://openairdocs.org/model/hughes-369): 5 aircraft (airframe model) - [Summa 369D](https://openairdocs.org/model/summa-369d): 4 aircraft (airframe model) - [MD Helicopters 369HS](https://openairdocs.org/model/md-helicopters-369hs): 3 aircraft (airframe model) - [Hughes 369HE](https://openairdocs.org/model/hughes-369he): 3 aircraft (airframe model) - [MD Helicopters 369HM](https://openairdocs.org/model/md-helicopters-369hm): 2 aircraft (airframe model) - [Summa 369HS](https://openairdocs.org/model/summa-369hs): 1 aircraft (airframe model) - [MD Helicopters 369A](https://openairdocs.org/model/md-helicopters-369a): 1 aircraft (airframe model) - [Mcdonnell Douglas Mdhs 369E](https://openairdocs.org/model/mcdonnell-douglas-mdhs-369e): 1 aircraft (airframe model) - [Hughes/Helicopter Assocs 369A](https://openairdocs.org/model/hughes-helicopter-assocs-369a): 1 aircraft (airframe model) - [Hughes/Batto John 369A (OH-6A)](https://openairdocs.org/model/hughes-batto-john-369a-oh-6a): 1 aircraft (airframe model) - [Hughes 369H](https://openairdocs.org/model/hughes-369h): 1 aircraft (airframe model) All 19 models: https://openairdocs.org/ad/82-14-01/models.md Every aircraft: https://openairdocs.org/ad/82-14-01/aircraft.md ## Related documents - [STC SH129WE](https://openairdocs.org/stc/SH129WE): Installation of Chadwick C-20 auxiliary fuel system. (369HS (SN 0101 & subs), 369HE (SN 0101 & subs), 369HM (SN 0201 & subs), 369D (SN 033 & subs)). Phoenix Air-Atlanta, Named in the applicability --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.