# AD 70-02-02: Sixth Stage Compressor Rotor Disc - Type: Airworthiness directive - Status: Current - Products: Pratt & Whitney Division JT8D-1, JT8D-11, JT8D-15, JT8D-15A, JT8D-17, JT8D-17A, JT8D-17AR, JT8D-17R, JT8D-1A, JT8D-1B, JT8D-209, JT8D-217 and 9 more - Effective: April 15, 1970 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-969 - Registered aircraft: 150 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9AA6CE3C545CAB9E86256E01005478D5.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/70-02-02 ## The airworthiness directive 70-02-02 PRATT & WHITNEY: Amdt. 39-922 as amended by Amendment 39-969. Applies to all JT8D series turbofan engines which incorporate the following serial number sixth stage compressor rotor disc: 1V5825 1V5969 1V6073 1V6371 1V5826 1V5970 1V6083 1V6375 1V5828 1V5976 1V6093 1V6394 1V5831 1V5977 1V6094 1V6398 1V6096 1V5980 1V5832 1V5833 1V5981 1V6097 1V6663 1V5835 1V5982 1V5851 1V5987 1V6101 2T8050 1V5857 1V5992 1V6103 1V5859 1V6106 7S6324 1V5860 1V6000 1V6112 1V5862 1V6003 1V6113 7S6409 1V5863 1V6005 1V6115 7S6449 1V5864 1V6006 1V6117 1V5871 1V6007 1V6132 8T7257 1V5875 1V6008 1V6148 1V5878 1V6010 1V6151 8T7335 1V5882 1V6013 1V6152 1V5885 1V6016 1V6158 8T7450 V5890 1V6020 1V6162 8T7462 1V5896 1V6022 1V6164 8T7470 1V6027 1V6171 8T7474 1V5904 1V6028 1V6172 8T7487 1V591 1V6031 1V6175 8T7489 1V5916 1V6032 1V6182 8T7490 1V59201V6034 1V6194 8T7491 1V5923 1V6036 1V5935 1V6043 1V6209 8T7513 1V5938 1V6046 1V6222 8T7517 1V5943 1V6047 1V6240 8T7520 1V5945 1V6050 1V6247 8T7524 1V5948 1V6054 1V6251 8T7544 1V5952 1V6056 1V6260 8T7552 1V5954 1V6057 1V6273 8T7562 1V5956 1V6058 1V6274 8T7569 1V5957 8T7567 1V6068 1V5964 1V6072 1V6350 8T7570 8T7572 8T7636 8T7681 8T7695 8T7588 8T7638 8T7686 8T7696 8T7589 8T7655 8T7688 8T7699 8T7597 8T7657 8T7689 8T7669 8T7690 8T7704 8T7621 8T7679 8T7692 8T7708 Compliance required as indicated. To preclude sixth stage compressor rotor disc failures as the result of abnormal processing of the edge radius in the base of the blade slots, accomplish the following: a. For engines incorporating any of the previously listed sixth stage compressor rotor discs: 1. With 1700 hours' or more in service since new within the next 600 hours in service after the effective date ofthis AD replace the suspect sixth stage compressor rotor disc with a new, used or reworked disc, approved by Chief, Engineering & Manufacturing Branch, Eastern Region, New York. 2. With 1700 hours' or less in service since new prior to the accumulation of 2300 hours' in service replace the suspect sixth stage compressor rotor disc with a new, used or reworked disc approved by Chief, Engineering & Manufacturing Branch, Eastern Region, New York. b. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region may adjust the compliance time. Amendment 39-922 effective February 16, 1970. This amendment (39-969) is effective April 15, 1970. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E2EA](https://openairdocs.org/tcds/E2EA): Pratt & Whitney; names 16 of 16 models: JT8D-17AR, JT8D-1, JT8D-17R, JT8D-15A, JT8D-15, JT8D-17, JT8D-7, JT8D-17A… - [TCDS E9NE](https://openairdocs.org/tcds/E9NE): Pratt & Whitney; names 5 of 5 models: JT8D-217C, JT8D-217A, JT8D-219, JT8D-209, JT8D-217 ## 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: 150 (0 by airframe model, 150 by engine model) - Makers: Mcdonnell Douglas 106, Boeing 39, Douglas 4, Beech 1 Models with the most aircraft: - [Pratt & Whitney JT8D series](https://openairdocs.org/engine/pratt-whitney-jt8d-series): 82 aircraft (engine model) - [Pratt & Whitney JT8D-219](https://openairdocs.org/engine/pratt-whitney-jt8d-219): 22 aircraft (engine model) - [Pratt & Whitney JT8D-9 series](https://openairdocs.org/engine/pratt-whitney-jt8d-9-series): 9 aircraft (engine model) - [Pratt & Whitney JT8D-1](https://openairdocs.org/engine/pratt-whitney-jt8d-1): 8 aircraft (engine model) - [Pratt & Whitney JT8D-17 series](https://openairdocs.org/engine/pratt-whitney-jt8d-17-series): 7 aircraft (engine model) - [Pratt & Whitney JT8D-17](https://openairdocs.org/engine/pratt-whitney-jt8d-17): 6 aircraft (engine model) - [Pratt & Whitney JT8D-15](https://openairdocs.org/engine/pratt-whitney-jt8d-15): 6 aircraft (engine model) - [Pratt & Whitney JT8D-9A](https://openairdocs.org/engine/pratt-whitney-jt8d-9a): 5 aircraft (engine model) - [Pratt & Whitney JT8D-217C](https://openairdocs.org/engine/pratt-whitney-jt8d-217c): 2 aircraft (engine model) - [Pratt & Whitney JT8D-9](https://openairdocs.org/engine/pratt-whitney-jt8d-9): 1 aircraft (engine model) - [Pratt & Whitney JT8D-15A](https://openairdocs.org/engine/pratt-whitney-jt8d-15a): 1 aircraft (engine model) - [Pratt & Whitney JT8D-17A](https://openairdocs.org/engine/pratt-whitney-jt8d-17a): 1 aircraft (engine model) All 12 models: https://openairdocs.org/ad/70-02-02/models.md Every aircraft: https://openairdocs.org/ad/70-02-02/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.