# AD 75-08-17: Digital Flight Data Recorders - Type: Airworthiness directive - Status: Current - Products: BAE Systems HS 748 Series 2A, HS 748 Series 2B, 727-100 Series, 727-100C Series, 727-200 Series, 727 Series, 727C Series, 737-100 Series, 737-200 Series, 737-200C Series, 747-100 Series, 747-100B Series and 81 more - Effective: December 19, 1975 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Amendment: 39-2459 - Registered aircraft: 209 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/28AA412973CC5CDD86256E520053AB00.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/75-08-17 ## The airworthiness directive 75-08-17 LOCKHEED AIRCRAFT SERVICE COMPANY: Amendment 39-2169 as amended by Amendment 39-2459. Applies to Lockheed Aircraft Service Company Model 209 Digital Flight Data Recorders installed in, but not limited to Boeing 727, 737 and 747, Douglas DC-8, DC-9, and DC-10, Lockheed L-1011, Dassault/Sud Fan Jet Falcon, Hawker-Siddeley DH-125 and 748, and Fokker F-28 airplanes, and Boeing-Vertol 114A (U.S. Army CH-47A) helicopters, certificated in all categories. Compliance required on or before January 1, 1976, unless already accomplished, except for Boeing 727 and 737 airplanes for which compliance is required on or before June 30, 1976, unless already accomplished. To provide satisfactory recording of the required flight data parameters, install four identical vibration isolators under the ARINC 1/2 ATR rack supporting the Model 209 Digital Flight Data Recorder in accordance with Lockheed Aircraft Service Company Drawing No. 10077J500, Revision F, dated March 14, 1975, or later FAA-approved revisions. Equivalent vibration isolators and/or installations may be approved by the Chief, Aircraft Engineering Division, FAA Western Region. Amendment 39-2169 was effective May 20, 1975. This amendment 39-2459 becomes effective December 19, 1975. ## Affected data sheets (12) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 4A25](https://openairdocs.org/tcds/4A25): The Boeing Company; names 27 of 27 models: DC-8-41, DC-8-52, DC-8-61, DC-8-53, DC-8-51, DC-8-63, DC-8-11, DC-8-72F… - [TCDS A6WE](https://openairdocs.org/tcds/A6WE): The Boeing Company; names 19 of 25 models: DC-9-12, DC-9-15F, DC-9-41, DC-9-13, DC-9-34F, DC-9-81 (MD-81), DC-9-33F, DC-9-83 (MD-83)… - [TCDS A3EU](https://openairdocs.org/tcds/A3EU): Textron Aviation Inc.; names 8 of 50 models: DH.125 Series 1A/R-522, DH.125 Series 400A, DH.125 Series 3A/R, DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 3A, DH.125 Series 1A/S-522, DH.125 Series 3A/RA - [TCDS A22WE](https://openairdocs.org/tcds/A22WE): The Boeing Company; names 7 of 11 models: DC-10-40, DC-10-10F, DC-10-30, DC-10-30F (KC-10A KDC-10), DC-10-10, DC-10-40F, DC-10-15 - [TCDS A20EU](https://openairdocs.org/tcds/A20EU): Fokker Services B.V.; names 6 of 6 models: F28 Mark 1000, F28 Mark 4000, F28 Mark 2000, F28 Mark 0070, F28 Mark 3000, F28 Mark 0100 - [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 6 of 14 models: 747-100B Series, 747-200B Series, 747-200F Series, 747-200C Series, 747SR Series, 747-100 Series - [TCDS A3WE](https://openairdocs.org/tcds/A3WE): The Boeing Company; names 5 of 6 models: 727-100 Series, 727 Series, 727-200 Series, 727-100C Series, 727C Series - [TCDS A23WE](https://openairdocs.org/tcds/A23WE): Lockheed Martin Corporation; names 4 of 4 models: L-1011-385-1-14, L-1011-385-3, L-1011-385-1, L-1011-385-1-15 - [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 3 of 17 models: 737-100 Series, 737-200C Series, 737-200 Series - [TCDS A24EU](https://openairdocs.org/tcds/A24EU): BAE Systems (Operations) Limited; names 2 of 2 models: HS 748 Series 2B, HS 748 Series 2A - [TCDS A7EU](https://openairdocs.org/tcds/A7EU): Dassault Aviation; names 1 of 11 models: Fan Jet Falcon - [TCDS H3EA](https://openairdocs.org/tcds/H3EA): Boeing Defense & Space Group; names 1 of 1 models: 114A ## 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: 209 (209 by airframe model, 0 by engine model) - Makers: Mcdonnell Douglas 109, Boeing 44, Dassault/Sud 24, Douglas 19, Mcdonnell-Douglas 5, Lockheed 4, British Aerospace 2, Hawker Siddeley 2 Models with the most aircraft: - [Mcdonnell Douglas DC-9-83(MD-83)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-83-md-83): 49 aircraft (airframe model) - [Dassault/Sud FAN JET FALCON](https://openairdocs.org/model/dassault-sud-fan-jet-falcon): 24 aircraft (airframe model) - [Mcdonnell Douglas DC-9-82(MD-82)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82): 22 aircraft (airframe model) - [Mcdonnell Douglas DC-9-87](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87): 13 aircraft (airframe model) - [Mcdonnell Douglas DC-10-30F](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f): 12 aircraft (airframe model) - [Boeing 727-223](https://openairdocs.org/model/boeing-727-223): 9 aircraft (airframe model) - [Douglas DC-10-40](https://openairdocs.org/model/douglas-dc-10-40): 6 aircraft (airframe model) - [Mcdonnell-Douglas DC-10-30](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30): 5 aircraft (airframe model) - [Boeing 727-227](https://openairdocs.org/model/boeing-727-227): 4 aircraft (airframe model) - [Boeing 737-205](https://openairdocs.org/model/boeing-737-205): 3 aircraft (airframe model) - [Mcdonnell Douglas DC-9-15F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-15f): 3 aircraft (airframe model) - [Mcdonnell Douglas DC-9-33F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-33f): 3 aircraft (airframe model) - [Boeing 727-225](https://openairdocs.org/model/boeing-727-225): 2 aircraft (airframe model) - [Boeing 747-123](https://openairdocs.org/model/boeing-747-123): 2 aircraft (airframe model) - [Boeing 747-251F](https://openairdocs.org/model/boeing-747-251f): 2 aircraft (airframe model) - [British Aerospace HS-748-2A](https://openairdocs.org/model/british-aerospace-hs-748-2a): 2 aircraft (airframe model) - [Douglas DC-8-73](https://openairdocs.org/model/douglas-dc-8-73): 2 aircraft (airframe model) - [Douglas DC-8-73F](https://openairdocs.org/model/douglas-dc-8-73f): 2 aircraft (airframe model) - [Hawker Siddeley DH.125-3A/RA](https://openairdocs.org/model/hawker-siddeley-dh-125-3a-ra): 2 aircraft (airframe model) - [Lockheed L-1011-385-1](https://openairdocs.org/model/lockheed-l-1011-385-1): 2 aircraft (airframe model) All 60 models: https://openairdocs.org/ad/75-08-17/models.md Every aircraft: https://openairdocs.org/ad/75-08-17/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.