# AD 89-23-14: Main Rotor Collective Tubes - Type: Airworthiness directive - Status: Current - Products: MD Helicopters 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM and 369HS - Effective: December 4, 1989 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-6392 - Docket: 89-ASW-26 - Registered aircraft: 614 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD1A6712115649EF86256A4E0046E063.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/89-23-14 ## The airworthiness directive 89-23-14 MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC): Amendment 39-6392. Docket No. 89-ASW-26. Applicability: Model 369 series helicopters, certificated in any category, with main rotor collective tube, P/N 369A7009-BSC; longitudinal control tube, P/N 369A7011-BSC; lateral control tube, P/N 369A7012-BSC; and tail rotor control tube, P/N 369A7007-BSC. Compliance: Required as indicated, unless already accomplished. To prevent fatigue failure of the control tubes which could result in loss of control of the helicopter, accomplish the following: (a) Within 25 hours' time in service after the effective date of this AD, and at intervals of 100 hours' time in service until the requirements of paragraph (c) are accomplished, remove and inspect for cracks the swaged ends of each main rotor collective control tube (P/N 369A7009-BSC), longitudinal control tube (P/N 369A7011-BSC), lateral control tube (P/N 369A7012-BSC), and each tail rotor control tube (P/N 369A7007-BSC)installed on a helicopter. If external cracks are observed as a result of this inspection, replace the control tube with a serviceable unit prior to further flight. NOTE: PART I of MDHC Service Information Notice DN-158.1, EN-48.1, FN-36.1, and HN-217.1 pertains to this AD. (b) Prior to installation, inspect for cracks the swaged ends of each main rotor collective control tube (P/N 369A7009-BSC), longitudinal control tube (P/N 369A7011-BSC), lateral control tube (P/N 369A7012-BSC), and tail rotor control tube (P/N 369A7007-BSC) from spares inventory. Reject control tubes found to be cracked as a result of this inspection. (c) Within 600 hours' time in service after the effective date of this AD remove and inspect each main rotor collective control tube (P/N 369A7009-BSC), longitudinal control tube (P/N 369A7011-BSC), lateral control tube (P/N 369A7012-BSC), and tail rotor control tube (P/N 369A7007-BSC) in accordance with the requirements of paragraph (a). Replace cracked tubes with BASIC (BSC) part numbers with the corresponding FAA-approved -5 configuration. Modify remaining BASIC (BSC) tubes to the corresponding FAA-approved -5 configuration before reinstallation. NOTE: PART II of MDHC Service Information Notice DN-158, EN-48, FN-36 or HN- 217 pertains to rework and reinstallation procedures. (d) In accordance with FAR Sections 21.197 and 21.199, the helicopter may be flown to a base where compliance with the AD may be accomplished. (e) An alternate method of compliance with this AD which provides an equivalent level of safety may be used if approved by the Manager, Los Angeles Aircraft Certification Office, FAA, 3229 E. Spring Street, Long Beach, California. This amendment (39-6392, AD 89-23-14) becomes effective on December 4, 1989. ## 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 10 of 12 models: 369D, 369E, 369F, 369FF, 369HS, 369HM, 369HE, 369H… ## 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: 614 (614 by airframe model, 0 by engine model) - Makers: Hughes Helicopters 241, MD Helicopters 142, Hughes 123, Mcdonnell Douglas Helicopter 83, Mcdonnell Douglas Heli 17, 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) - [MD Helicopters 369FF](https://openairdocs.org/model/md-helicopters-369ff): 94 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) - [Mcdonnell Douglas Heli 369FF](https://openairdocs.org/model/mcdonnell-douglas-heli-369ff): 17 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) - [Hughes Helicopters 369FF](https://openairdocs.org/model/hughes-helicopters-369ff): 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) - [Hughes 369F](https://openairdocs.org/model/hughes-369f): 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) All 24 models: https://openairdocs.org/ad/89-23-14/models.md Every aircraft: https://openairdocs.org/ad/89-23-14/aircraft.md Its text cites no advisory circulars or STCs. --- 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.