# TCDS A-703: Piper Aircraft Inc. - Type: Type certificate data sheet - Status: Current - Holder: Piper Aircraft Inc. - Revision: 5 - Revised: August 7, 2006 - Product: Aircraft, Small Airplane - Certification basis: CAR 4a - Registered aircraft: 142, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/93/e7/93e7bcddbbbb1440af6c2e50b68a6bb6129c7d059a542c9ab64c70637e3a249d - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9B8585992450B29A862572090072DE81.0001 - Page: https://openairdocs.org/tcds/A-703 ## Models (3) As the data sheet lists them. - J4A - J4A-S - J4 ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION A-703 Revision 5 Piper Aircraft, Inc J4 J4A J4A-S August 7, 2006 AIRCRAFT SPECIFICATION NO. A-703 Type Certificate Holder Piper Aircraft, Inc. 2926 Piper Drive Vero Beach, Florida 32960 Type Certificate Holder Record The New Piper Aircraft, Inc transferred TC A-703 to Piper Aircraft, Inc on August 7, 2006. I - Model J4, 2 PCLM, Approved October 26, 1938 Engine Continental A-50-1 (See Item 301 for optional engines) Fuel 73 min. octane aviation gasoline Engine Limits For all operations, 1900 r.p.m. (50 hp.) Airspeed Limits Level flight or climb 100 mph True Ind. (CAS) Glide or dive 135 mph True Ind. Propeller Limits Maximum permissible diameter 84 in. (with Item 101) C. G. Range (+12.9) to (+21.0). See NOTE 3(a) for restricted limits on Serial Nos. 4-400 through 4-410. Empty weight C. G. Range (+15.1) to (+19.6) when standard fuel tank only is installed. (+15.1) to (+16.6) when auxiliary fuel tank (Item 306) is installed. Ranges are not valid for non-standard arrangements or for restricted C. G. limits per NOTE 3(a). When empty weight C. G. falls within the pertinent range, computation of critical fore and aft C. G. positions is unnecessary. Maximum Weight 1200 lbs. Number of Seats 2 (+19.5) Maximum Baggage 105 lbs. (+43.5) Fuel Capacity 16 gallons (-10.5) Oil Capacity 1 gallon (-30) Control Surface Movements Not available. Serial Numbers Eligible 4-400 and up. (See NOTE 3 for additional limitations on Serial Nos. 4-400 through 4-452). Required Equipment Items 101, 102, 103, 105, 106, and 107. Page No. 1 2 3 4 5 Rev. No. 5 4 4 4 4 A-703 Page 2 of 5 II - Model J4A, 2 PCLM, Approved March 4, 1939 and Model J4A-S, 2 PCSM, Approved July 25, 1939 Engine Continental A-65-1 (See Item 301 for optional engines) Fuel 73 min. octane aviation gasoline Engine Limits For all operations, 2350 r.p.m. (65 hp.) Airspeed Limits Level flight or climb 100 mph True Ind. Glide or dive 135 mph True Ind. Propeller Limits Maximum permissible diameter - Landplane 84 in. (with Item 101) Seaplane 91 in. C. G. Range Landplane (+12.9) to (+21.0) Seaplane (+12.0) to (+20.0) Empty Weight C. G. Range Landplane (+14.9) to (+19.8) with standard fuel tank only. (+14.9) to (+17.1) when auxiliary fuel tank (Item 306) is installed. Seaplane (+13.5) to (+18.4) with standard fuel tank only. (+13.5) to (+16.0) when auxiliary fuel tank (Item 306) is installed. When empty weight C. G. falls within the pertinent range, computation of critical fore and aft C. G. positions is unnecessary. Ranges are not valid for non-standard arrangements. Maximum Weight Landplane 1200 lbs. (See NOTE 3 regarding approval for 1301 lbs.) Seaplane 1350 lbs. Number of Seats 2 (+19.5) Maximum Baggage 105 lbs. (+43.5) Fuel Capacity 16 gallons (-10.5) Oil Capacity 1 gallon (-30) Control Surface Movements Not available. Serial Numbers Eligible 4-400 and up. (See NOTE 3 for additional limitations on Serial Nos. 4-400 through 4-452). Required Equipment Landplane Items 101, 102, 103, 105, 106, and 107. Seaplane Items 101, 105, 106, 107, and 151. Data Pertinent to All Models Datum Leading edge of wing Leveling Means Level with 30 inch level (Front and 9 inches aft wing leading edge) against bottom of second rib out with back end blocked down ¼ inch. Certification Basis Type Certificate No. 703 (CAR 4a) Production Basis Approved for manufacture of spare parts only under Production Certificate No. 206. Export Eligibility Deleted as of - July 31, 1995 Page 3 of 5 A-703 Equipment A plus (+) or minus (-) sign preceding the weight of an item of equipment indicates net weight change when that item is installed. Approval for the installation of all items of equipment listed herein has been obtained by the aircraft manufacturer except those items preceded by an asterisk (*). The asterisk denotes that approval has been obtained by someone other than the aircraft manufacturer. An item marked with an asterisk may not have been manufactured under an FAA monitored or approved quality control system, and therefore attention should be paid to workmanship and conformity with pertinent data called for in this specification. Propellers and Propeller Accessories 101. Propeller - wood (fixed pitch) +12 lbs. (-50) *1. Propeller - Beech, Controllable, R002 or R003 with +32 lbs. (-50) R002-205-72 blades including Beech Manual Control. For interchangeable blades see Prop. Spec. No. 804 (NOTE 6). Diameter: 72 in. Pitch settings at 24 in. station: Low 12°, High 19° Eligible on Model J4A only with Continental A-65 Series engine. *2. Propeller - McCauley Model 1A90 +26 lbs. (-50) (Models J4A and J4A-S with Continental A-65 Series engine) Diameter: Not over 74 in., not under 72.5 in. Static r.p.m. at maximum permissible throttle setting: Not over 2250, not under 2060. No additional tolerance permitted. 3. Propeller - Sensenich 74-FK-49 or an y other fixed pitch +11 lbs. (-50) wood propeller which is eligible for the engine power and speed and which meets the following limits: Diameter: Not over 74 in., not under 72.5 in. Static r.p.m. at maximum permissible throttle setting: Not over 2175, not under 2075. No additional tolerance permitted. Eligible with Item 301(b)(4) only. *4. Propeller - Sensenich M74CK fi xed pitch metal +21 lbs. (-50) (Models J4A and J4A-S with A65 engine) Static r.p.m. at maximum permissible throttle setting: Not over 2250, not under 2060. No additional tolerance permitted. Diameter: Not over 74 in., not under 72.5 in. Engines and Engine Accessories - Fuel and Oil System No aircraft of these models shall be eligible for original certification with single ignition engines after August 1, 1941. In addition, no aircraft of these models shall be eligible for recertification with single ignition engines unless such aircraft were either previously certificated with si ngle ignition engines or were originally certificated prior to August 1, 1941. 106. Carburetor heater (Dwg. D-722C) 107. Enclosed type engine cowling with revised exhaust system +29 lbs. (-29) (Dwg. 659-C and D 7239-C) (Serial Nos. 4-828 and up only) *108. Oil filter, Fram Model PB-5, Kit No. 510, Dwg. No. 61542 +5 lbs. (-22.5) A-703 Page 4 of 5 *301. Engines, Continental (See Engine Specification Nos. 190 and 205) (-27) (a) Model J4 (1) A-50-2 +6 lbs. (2) A-50-3 or A-50-8 +10 lbs. (3) A-50-4 +3 lbs. (4) A-50-5 or A-50-9 +13 lbs. (5) A-50-6 +16 lbs. (6) A-50-7 No Weight Change (b) Models J4A and J4A-S (1) A-65-3 or A-65-8 +10 lbs. Engine limits: For all operations, 2300 r.p.m. (65 hp.) (2) A-65-6 or A-65-9 +13 lbs. Engine limits: For all operations, 2300 r.p.m. (65 hp.) (3) A-65-7 No Weight Change Engine limits: For all operations, 2300 r.p.m. (65 hp.) (4) C-85-12 (J4A with Item 3 propeller) +17 lbs. Engine limits: For all operations, 2575 r.p.m. (85 hp.) 306. (a) Auxiliary 9 gallon fuel tank installation +11 lbs. (+57) Placard fuel selector valve: "Use main tank for takeoff and landing. In level flight, use auxiliary tank before using main." (b) 5 quart oil capacity No Weight Change 309. Revised engine mount (Dwg. D7060-E, Revision G) Neglect Weight Change for engines incorporating integral rubber shocks. 318. Oil cooler, Harrison Model He202 +5 lbs. (-42) Landing Gear and Floats 102. 8.00-4 wheels with brakes (Goodrich 841) and tires +25 lbs. (+7) 103. (a) Shock cord tail wheel insta llation, Dwg D311-E +7 lbs. (+174) (Serial Nos. 4-400 to 4-827, inclusive) (b) Leaf spring tail wheel installation, Dwg. D395-E or D3010-E +10 lbs. (+176) (Serial Nos. 4-828 and subsequent) 151. Float installation, Edo 60-1320 (including one water rudder -165 lbs.) +106 lbs. (+6) 303. Wheel streamlines +6 lbs. (+7) 305. 8.00-4 4-ply tires 311. Parking brake (Dwg. D4159-C) +3 lbs. (-5) 313. Skis (Eligible on any airplane of these models Use Actual Weight Change provided the propeller inst allation meets the minimum 9 inches ground clearance. The maximum weight for the skiplane will be the same as for the corresponding landplane or that shown in parenthesis after ski model, whichever is less). (a) Piper S-1000 (maximum 1200 lbs.) *(b) Fairbanks MF-5 (maximum 1310 lbs.) *(c) Federal SA-1 or SA-2 (max imum 1200 lbs. and 1400 lbs., respectively) *(d) Federal SC-1 or SC-2 (maximum 1400 lbs. and 1650 lbs., respectively) *(e) Aviation Service B (maximum 1650 lbs.) *(f) Air Transport 1220-480 (maximum 1220 lbs.) *(g) Air Transport 1460-580 (maximum 1460 lbs.) *(h) Marston MFS-1600 (maximum 1600 lbs.) *(i) Heath 655 (maximum 1210 lbs.) *(j) Heath 725 or 725A (maximum 1450 lbs.) Page 5 of 5 A-703 *(k) Jack Carr Servi ce 16 (maximum 1600 lbs.) *(l) Federal A-1500 or A-1500A (m aximum 1500 lbs.) per Federal Dwg. 11R262 *(m) Federal A-1850 (maximum 1850 lbs.) per Federal Dwg. 11R262 *(n) Federal A-2000 or A-2000A (maximum 2000 lbs.) per Federal Dwg. 11R262 *(o) Wesco per Western Aircraft Equipment Company Dwg. Nos. 12 and 148: (1) A-15 (maximum 1500 lbs.) (2) A-20 or AS-2 (maximum 200 lbs.) (3) A-25, AS-2A or AS-2B (maximum 2500 lbs.) Electrical Equipment 104. Battery and box, Exide 3-AC-7 or Willard SYR-7-3 +9 lbs. (+16) 314. Battery, 12V, Willard SYR-7-6 +15 lbs. (+16) 315. Generator, Wind-driven, Air A ssociates No. GE20 +7 lbs. (+5) 317. Landing light, Grimes retractable +4 lbs. (+15) Interior Equipment 302. Miscellaneous instru ments +10 lbs. (-1) 304. Cabin heater (D-722C) 316. Flares +9 lbs. (+31) Miscellaneous (Not listed above) 105. Two cabin doors *307. Stainless steel tail surfaces Neglect Weight Change (Budd Dwgs. Nos. 13-6200, 13-6600, 13-6500) 308. Modified aileron leading edge (Dwg. D4113-C) Neglect Weight Change 310. Corrosion proofing +7 lbs. NOTE 1. Current weight and balance report including list of e quipment included in certificated empty weight, and loading instructions when necessary, must be in each aircraft at the time of original certification and at all times thereafter (except in the case of air carrier ope rators having an approved weight control system). NOTE 2. Placard fuel selector valve as follows, when auxiliary tank (Item 306(a)) is installed: "Use main tank for takeoff and landing. In le vel flight, use auxiliary tank before using main." NOTE 3. (a) Model J4. Serial Nos. 4-400 to 4-410, inclusive, eligible with forward C. G. limit of only (+14.1) unless leading edge of stabilizer is set so that the bolts in the stabilizer yoke adjustment bracket are located in next t o t h e bottom hole in the fitting as shown on Piper Dwg. D450-F. Executed Repair and Alteration Form required as evidence of compliance. (b) Model J4A. Serial Nos. 4-400 to 4-501, inclusive, must have the leading edge of the stabilizer set so that the bolts in the stabilizer yoke attachment brackets are located in the top hole of the fitting as shown on Piper Dwg. D450-F. Serial Nos. 4-460, 4-481, 4- 502 and up are eligible at maximum weight of 1301 lbs. (c) Model J4A-S. Serial Nos. 4-460, 4-481, 4-502 and up eligible provided the leading edge of stabilizer yoke attachment brackets are located in next to the top hole of the fitting as shown on Piper Dwg. D450-F. ....END.... ``` ## ADs (10, in force first) - [AD 2025-02-11](https://openairdocs.org/ad/2025-02-11): Rudder Structure · FS 2001 J5A (Army L-4F), J5A-80, J5B (Army L-4G) and 67 more. Effective Mar 20, 2025 - [AD 2015-08-04](https://openairdocs.org/ad/2015-08-04): Wings · FS 2000 L-14, AE-1, HE-1 and 77 more. Effective Jun 3, 2015 - [AD 2001-23-17](https://openairdocs.org/ad/2001-23-17): GNS 430 units · Cessna 172, 182, 206 and 209 more. Effective Dec 28, 2001 - [AD 96-09-06](https://openairdocs.org/ad/96-09-06): Air Filter Assemblies · Maule Aerospace Technology 7ACA, 7ECA, 7FC and 180 more. Effective Jun 7, 1996 - [AD 85-06-04](https://openairdocs.org/ad/85-06-04): Fuel Tank · FS 2001 AE-1, HE-1, J5A-80 and 60 more. Effective May 4, 1985 - [AD 78-10-03](https://openairdocs.org/ad/78-10-03): Fuel Venting · FS 2001 AE-1, HE-1, J5A-80 and 66 more. Effective May 23, 1978 - [AD 68-05-01](https://openairdocs.org/ad/68-05-01): Exhaust Mufflers · FS 2001 J5A-80, J5A (Army L-4F), J5B (Army L-4G) and 67 more. Effective Mar 31, 1968 - [AD 99-01-05 R1](https://openairdocs.org/ad/99-01-05-R1) (historical): Wings · FS 2000 L-14, AE-1, HE-1 and 73 more. Effective Jan 14, 2014 - [AD 99-01-05](https://openairdocs.org/ad/99-01-05) (historical): Wing Lift Struts or Forks · FS 2000 L-14, AE-1, HE-1 and 73 more. Effective Feb 8, 1999 - [AD 93-10-06](https://openairdocs.org/ad/93-10-06) (historical): Corroded Wing Lift Struts or Cracked Forks · Piper Aircraft, Inc., The New J-2, J-3, J4 and 28 more. Effective Jul 9, 1993 ## Registered aircraft by registry model (OpenAirDocs) - [Piper J4A](https://openairdocs.org/model/piper-j4a): 125 aircraft (registry code 7100604) - [Piper J4](https://openairdocs.org/model/piper-j4): 15 aircraft (registry code 7100602) - [Piper J4A-S](https://openairdocs.org/model/piper-j4a-s): 1 aircraft (registry code 7100606) - [Piper-Crockett J-4A](https://openairdocs.org/model/piper-crockett-j-4a): 1 aircraft (registry code 7100605) ## STCs approved under this data sheet (80, first 50) - [STC SA01233SE](https://openairdocs.org/stc/SA01233SE): Fabrication and installation of Alaskan Bushwheel LLC tail wheel and fork assembly. ABI, LLC - [STC SA04837NY](https://openairdocs.org/stc/SA04837NY): Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights. AeroLED's Holdings, LLC - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC - [STC SA00079NY](https://openairdocs.org/stc/SA00079NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less.. Airwolf Filter Corporation - [STC SA02525LA](https://openairdocs.org/stc/SA02525LA): Installation of Wheel and Brake Assemblies. Game Aerospace LLC - [STC SA01704LA](https://openairdocs.org/stc/SA01704LA): Installation of the Grove Disk Brake System. Grove Aircraft Landing Gear Systems Inc. - [STC SA00081NY](https://openairdocs.org/stc/SA00081NY): Installation of Iceman Aviation Supplies, Inc. Carburetor Ice Detector.. Alcor LLC - [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system.. Shady Aviation LLC - [STC SA02386AK](https://openairdocs.org/stc/SA02386AK): Replacement of existing landing and/or taxi light reflector and bulbs with Light Emitting Diode (LED) lighting systems. AeroLED's Holding LLC - [STC SA03898NY](https://openairdocs.org/stc/SA03898NY): Installation and maintenance of ORATEX covering and coating material. Aircraft Design & Certification Ltd - [STC SA4503NM](https://openairdocs.org/stc/SA4503NM): Remove original cloth covering and install Ceconite covering. Ceconite Division of Poly-Fiber Inc. - [STC SA02987CH](https://openairdocs.org/stc/SA02987CH): Installation of the Electroair Electronic Ignition System. Electroair Acquisition Corporation - [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc. - [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc. - [STC SA01015SE](https://openairdocs.org/stc/SA01015SE): Installation of eligible Alaska Bushwheel, Inc. wheels and TSO-C62d tires. ABI LLC - [STC SA02553AK](https://openairdocs.org/stc/SA02553AK): Fabrication and installation of a Tail Wheel Anti-Shimmy Dampener. Keller Engineering Group LLC - [STC SA220SO](https://openairdocs.org/stc/SA220SO): Tow bar, release mechanism, and safety tow link.. Fliegen Works Inc. d/b/a Pacific Aerial Tow Hooks - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation - [STC SA04032CH](https://openairdocs.org/stc/SA04032CH): Install rocker switch assemblies. Electroair Acquisition Corporation - [STC SA00344BO PAGE 1](https://openairdocs.org/stc/SA00344BO%20PAGE%201): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.. Whelen Aerospace Technologies - [STC SA02212AK](https://openairdocs.org/stc/SA02212AK): Replacement of existing landing and/or taxi light reflector and bulbs with high intensity discharge (HID) lighting systems. Seaplanes North LLC - [STC SA3606NM](https://openairdocs.org/stc/SA3606NM): Installation of landing gear fueling step.. F. Atlee Dodge Aircraft Services, LLC - [STC SA10077SC](https://openairdocs.org/stc/SA10077SC): Installation of push-button starter system.. Hartzell Engine Technologies, LLC - [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts.. Andrew D. Humphrey - [STC SA00780SE](https://openairdocs.org/stc/SA00780SE): Installation of the True Lock Safety Retention Axle Lock Nut System. True Lock LLC - [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric.. Aviation Products Systems Inc. - [STC SA4305WE](https://openairdocs.org/stc/SA4305WE): Installation of GAR-AERO wheel adapters and tundra type tires on the main landing gear. Seaplanes North LLC - [STC SA10921SC](https://openairdocs.org/stc/SA10921SC): Installation of an alternator and regulator as a replacement to existing OEM generators and mechanical voltage regulators. Hartzell Engine Technologies, LLC - [STC SA02283SE PAGE 1](https://openairdocs.org/stc/SA02283SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc. - [STC SA02402SE PAGE 2](https://openairdocs.org/stc/SA02402SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc. - [STC SA02428AK](https://openairdocs.org/stc/SA02428AK): Installation of a hydraulically actuated ski drag assembly. Northern Airframes LLC - [STC SA02295SE](https://openairdocs.org/stc/SA02295SE): Installation of an alternate method of fastening aluminum wing ribs to wood spars. Rainbow Flying Service LLC - [STC SA01765SE](https://openairdocs.org/stc/SA01765SE): Installation of Alaskan Bushwheel TSO-C26d wheels, Part Number (P/N) ABI-1010. ABI, LLC - [STC SA01026SE](https://openairdocs.org/stc/SA01026SE): Improved fuel gascolator assembly.. Steve's Aircraft - [STC SA02825NY PAGE 1](https://openairdocs.org/stc/SA02825NY%20PAGE%201): Installation of Aerospace Logic Aircraft Instruments. Aerospace Logic Inc. - [STC SA02110CH](https://openairdocs.org/stc/SA02110CH): Installation of a Time Trac Data Recorder. P2 Incorporated - [STC SA02002SE](https://openairdocs.org/stc/SA02002SE): Installation of vortex generators on the above model aircraft. Micro AeroDynamics Inc - [STC SA593CH](https://openairdocs.org/stc/SA593CH): Install Champion SlickSTART magneto booster system.. Champion Aerospace LLC - [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line.. M-20 Oil Separators LLC - [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.. Electronics International - [STC SA5-65](https://openairdocs.org/stc/SA5-65): Installation of Goodyear 25 x 11.0 - 4 Type IV tires with tubes on Goodrich Model 841696 4-inch wheels on main landing gear, using Alaskan Aircraft Equipment Supply Model A-1 rim adapters. Douten Thomas - [STC SA01944CH](https://openairdocs.org/stc/SA01944CH): Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index, per ASTM Specification D-439 or D-4818 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227.. Experimental Aircraft Association Inc. - [STC SA737GL](https://openairdocs.org/stc/SA737GL): Superseded by STC SA01944CH. Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index.. EAA Aviation Foundation - [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc - [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material.. Poly-Fiber Inc. - [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc - [STC SA02520AT](https://openairdocs.org/stc/SA02520AT): Installation of M-20 Oil Separator, model 600-WP.. M-20 Oil Separators LLC - [STC SA00932SE](https://openairdocs.org/stc/SA00932SE): Installation of the Stewart wing tip assembly. Steve Pierce - [STC SA71GL](https://openairdocs.org/stc/SA71GL): Installation of air filters. Brackett Aero Filters Inc. - [STC SA02093AK](https://openairdocs.org/stc/SA02093AK): Installation of hourmeter airspeed switch.. Avalaska Inc All 80: https://openairdocs.org/tcds/A-703/stcs.md --- 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.