# AD 82-09-01: Fuel Pressure Regulator Inlet and Outlet - Type: Airworthiness directive - Status: Current - Products: Continental Motors TSIO-520-J, TSIO-520-K, TSIO-520-N and TSIO-520-NB - Effective: July 8, 1982 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-4412 - Registered aircraft: 4,178 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/26F853E8CB4E792586256840006A2407.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/82-09-01 ## The airworthiness directive 82-09-01 TELEDYNE CONTINENTAL MOTORS: Amendment 39-4412. Applies to the following engines installed in, but not limited to, Cessna Models 340 and 414 series airplanes: NEW ENGINES: TSIO-520-NB serial numbers 519735 thru 519738, 519781 thru 519785, 519885 thru 519890, 519893 thru 519897, 519899 through 519915, 519929 thru 519933, 519935 thru 519937, 519939 thru 519962, 521026 thru 521045, 521049 thru 521074, 521085 thru 521088, 521097, 521141 thru 521168, 521170 thru 521183, 521187 thru 521237, 521239 thru 521247, 521249 thru 521255, 521257, 521258, 521260 thru 521281, 521284 thru 521305, 521307 thru 521335, 521339, 521340, 521342 thru 521345, 521347, 521349, 521351, 521353, 521354, 521357, 521358, 521362, 521365, 521366, 521371, 521378, 521384, 521385, 521393, 521395, 521398, 521413 thru 521418, 521441, 521442, 521455, 521461. REBUILT ENGINES: TSIO-520-J serial numbers 218830, 218831, 218836, 218838 thru 218873; TSIO- 520-K serial numbers 224563, 224565 thru 224573; TSIO-520-N serial numbers 228231, 228243, 228248 thru 228250, 228255, 228262 thru 228363, 228365 thru 228368, 228373; TSIO-520-NB serial numbers 233976, 233982, 233986, 233987, 233989 thru 234058, 234060 thru 234069, 234071 thru 234074, 234077, 234078. Compliance is required as indicated unless already accomplished. To prevent the possibility of a fuel leak which could result in an engine compartment fire, accomplish the following: A. Prior to next flight, activate the boost pump to static check the fuel pressure regulator inlet and outlet for leaks. Visually inspect in the area of the fuel pressure regulator for the presence of fuel stains. If either inspection indicates a leak or stains, comply with Paragraph B before further flight. If no leak or stain is evident, comply with Paragraph B within the next 10 hours of operation. B. Remove the fuel fittings from the regulator and inspect the thread bores in the regulator and the threads of the fittings. If the threads in the regulator appear damaged, cut, or chipped (when compared to a normal pipe thread), replace the fuel pressure regulator with a serviceable regulator of a like part number. Replace any damaged fittings. Prior to installing the fittings, clean the threads with clean degreaser, Loctite "LOQUIC PRIMER T" or equivalent, to be sure all oil and dirt is removed. Blow dry with dry compressed air. Apply Loctite Hydraulic Sealant 69 or 569 or equivalent sparingly 3/4 of the way around on the fitting threads only. To avoid contamination of the fuel cavity, do not apply sealant to the first thread. Install the fittings until tight (at least 3-5 threads engagement). Allow sealant to cure for 30 minutes before pressure testing. NOTE: Teledyne Continental Motors Service Bulletin No. M82-5, dated April 26, 1982, pertains to this subject. An equivalent method of compliance may be approved by the Chief, Atlanta Aircraft Certification Office, Federal Aviation Administration, ACE-115A, P.O. Box 20636, Atlanta, Georgia 30320. This amendment becomes effective July 8, 1982, as to all persons except those to whom it was made immediately effective by priority mail, issued April 16, 1982. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E8CE](https://openairdocs.org/tcds/E8CE): Continental Aerospace Technologies, Inc.; names 4 of 31 models: TSIO-520-J, TSIO-520-K, TSIO-520-NB, TSIO-520-N ## 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: 4,178 (0 by airframe model, 4,178 by engine model) - Makers: Cessna 3,240, Beech 672, Piper 173, Raytheon 61, Mooney 13, Cirrus Design 2, Meyers Industries 2, Navion 2, Ryan 2, Aero Commander 1 Models with the most aircraft: - [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series): 4,064 aircraft (engine model) - [Continental TSIO-520-NB](https://openairdocs.org/engine/continental-tsio-520-nb): 52 aircraft (engine model) - [TCM Cont TSIO-520 series](https://openairdocs.org/engine/tcm-cont-tsio-520-series): 49 aircraft (engine model) - [Continental TSIO-520-N](https://openairdocs.org/engine/continental-tsio-520-n): 11 aircraft (engine model) - [Continental TSIO-520-J](https://openairdocs.org/engine/continental-tsio-520-j): 1 aircraft (engine model) - [Continental TSIO-520-K](https://openairdocs.org/engine/continental-tsio-520-k): 1 aircraft (engine model) All 6 models: https://openairdocs.org/ad/82-09-01/models.md Every aircraft: https://openairdocs.org/ad/82-09-01/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.