# TCDS A-816: Acro Aeronautical Services Ltd - Type: Type certificate data sheet - Status: Current - Holder: Acro Aeronautical Services Ltd - Revision: 7 - Revised: February 15, 2022 - Product: Aircraft, Small/Large Airplane - Registered aircraft: 1, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/da/f7/daf735a9b2e01039ea649065cf492d52f754d3f0c71faac45ad1b4554a6cd5f7 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/02A875C876EB6F2D862587F3006792DF.0001 - Page: https://openairdocs.org/tcds/A-816 ## Models (3) As the data sheet lists them. - D.H.114 Heron Series 2DA - D.H.114 Heron Series 2A - D.H.114 Heron Series 2X ## 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-816 Revision 7 Acro Aeronautical D.H. 114 Heron Series 2A Series 2DA Series 2X February 15, 2022 TYPE CERTIFICATE DATA SHEET No. A-816 This Data Sheet, which is part of Type Certificate No. A-816 prescribes conditions and limitations under which the product for which the Type Certificate was issued meets the airworthiness requirements of the Federal Aviation Regulations. Type Certificate Holder Acro Aeronautical Services Ltd. Culham Science Centre, Abingdon, Oxon, OX14 3DB. United Kingdom Type Certificate Holder Record The de Havilland Aircraft Co. Ltd. transferred TC A-816 to Hawker Siddeley Group in 1960. Hawker Siddeley Group transferred TC A-816 to British Aerospace plc (BAe) in 1977. British Aerospace plc (BAe) transferred TC A-816 to BAE Systems plc in 1999. BAE Systems transferred TC A-816 to de Havilland Support Ltd. in 2000. de Havilland Support Ltd. transferred TC A-816 to Acro Aeronautical Services Ltd. on February 25, 2015. I - Model D.H.114 Heron: Series 2A, Approved June 24, 1957; Series 2DA, Approved May 19, 1958; Series 2X, Approved August 29, 1960 Engines 4 de Havilland Gipsy Queen 30 Mark 2 Fuel Minimum grade 91/96 Maximum lead content 4.56 mls. TEL/U.S. gallon Engine limits Maximum continuous (Sea Level) (Full throttle) Maximum Weak Mixture, 2,500 ft. (26 in.Hg.) Maximum takeoff (5 min.), full throttle Maximum Overspeed, full throttle 2500 rpm (250 bhp) 2500 rpm (225 bhp) 2500 rpm (250 bhp) 2625 rpm Propellers Series 2A and 2DA Design No. PD 190/212 Hub Assembly PPX 21206 Blade Assembly PPR 2911456A-116-1 Types: Pitch: Diameter: 2-bladed (Metal) feathering Variable 7 feet Page No. 1 2 3 4 5 Rev. No. 7 6 6 7 6 A-816 2 Propellers (cont’d) Series 2X Design No. Hub Assembly Blade Assembly PD 170/212/1 PPX.21205 PP.1111456A -59 or PP.1111456A -59-1 Types: 2-bladed (Metal) Pitch: Variable Diameter: 7 feet or PD 190/212 PPX.21206 PPR 2911456A-116 or PPR 2911456A-116-1 Types: 2-bladed (Metal) feathering Pitch: Variable Diameter: 7 feet Airspeed limits Normal operating limit 174 knots I.A.S. Never exceed 200 knots I.A.S. Flaps extended (See NOTE 3 for 20° setting) 100 knots I.A.S. Landing gear extended 135 knots I.A.S. C.G. range (with Series 2A and 2DA landing gear extended) (-0.14) to (+8.10) at 13,500 lb. (-6.35) to (+8.10) at 8900 lb. or less Series 2X (-1.46) to (+8.10) at 12,499 lb. (-6.35) to (+8.10) at 8900 lb. or less Distances shown are plus (+) behind and minus (-) ahead of the datum. Straight line variation between points given. Landing gear retraction moment +3180 in.lb. Datum 86.7 inches aft of the front leveling peg on the port side of the fuselage. Leveling means Straight edge placed upon 2 pegs on the port side of the fuselage, parallel to fuselage horizontal datum line. Maximum weight Series 2A and 2DA Takeoff 13,500 lb., Landing 13,150 lb. Series 2X Takeoff 12,499 lb., Landing 12,499 lb. with de Havilland Heron Mod. 757 11,900 lb. without de Havilland Heron Mod. 757 No. of seats 10; 13; 16, 17 or 19 10 seater location: Seat Occupant Seat Occupant 2 (crew) (-109.2) (-109.2) 2 (rearward facing) (-63.36) (-59.76) 2 (forward facing) (- 7.44) (-11.04) 2 (rearward facing) (+38.64) (+42.24) 2 (forward facing) (+94.44) (+90.84) 13- seater location: Seat Occupant Seat Occupant 2 (crew) (-109.2) (-109.2) 2 (forward facing) (- 82.2) ( -82.2) 2 (forward facing) (- 49.8) (- 49.8) 2 (forward facing) (- 17.4) ( -17.4) 2 (forward facing) (+54.96) (+58.56) 2 (forward facing) (+103.8) (+100.2) 1 (forward) (+144.6) (+144.6) 3 A-816 No. of seats (cont’d) 16, 17 or 19-seater location: Seat & Occupant Seat & Occupant 2 (crew) (-109.2) 2 (- 82.2) 2 (- 49.8) 2 (- 17.4) 2 (+ 15.0) 2 (+ 47.4) 2 (+ 79.8) 2 (+112.2) 1 (+144.6) 2 (+177.0) Maximum baggage Maximum floor loading: Front locker 100 lb. per sq. ft. Cabin Rear locker 75 lb. per sq. ft. 150 lb. per sq. ft. Maximum load: Front locker 300 lb. Rear Locker, Version A (14 passenger seats and toilet and 8 passenger seat version) 850 lb. Version B (15 passenger seats and toilet and 11 passenger seat version) 700 lb. Version C (15 passenger seats, no toilet) 750 lb. Version D (17 passenger seats, no toilet) 450 lb. Overall maximum load, including chair weight: Total for front locker plus cabin forward of front face of front spar 1400 lb. Total for cabin between rear face of front spar and center line of rear spar (49.3 in. aft of datum) 550 lb. Total for cabin aft of center line of rear spar including rear locker 2000 lb. Fuel capacity Series 2A and 2DA (usable) 494 U.S. gallons (in wings): Two tanks 67 U.S. gallons each (-5.5) Two tanks 122 U.S. gallons each (+21.6) Two pairs of tanks 58 U.S. gallons per pair (-4.56) required when de Havilland Heron Modification 918 is not incorporated. When de Havilland Heron Modification 918 is incorporated the installation of these tanks is optional. Series 2X 378 U.S. gallons (in wings): Two tanks 67 U.S. gallons each (-5.5) Two tanks 122 U.S. gallons each (+21.6) Oil capacity 43.2 U.S. gallons in engine nacelles (usable) Two tanks 10.8 U.S. gallons each (-13.2) Two tanks 10.8 U.S. gallons each (-8.4) Control surface movements Elevator Up 24° 30' + 1° Down 16° 30' + 1° Elevator trim tab Up 16° + 1° Down 16° + 1° Rudder Right 19° + 1° Left 19° + 1° Rudder trim tab Right 18° + 0° 45' Left 18° + 0° 45' (with rudder neutral) Aileron Up 19° + 1° Down 19° + 1° with reference to the initial setting 3°15' Flaps trailing edge of float. Down 60° + 1° Stabilizer fixed A-816 4 Serial Nos. eligible Series 2A, 2DA and 2X (See NOTE 5) The United Kingdom Certificate of Airworthiness endorsed as noted below under "Import requirements" must be submitted for each individual aircraft for which application for certification is made. Required equipment (1) de Havilland D.H. 114 Heron Maintenance and Repair Manual. (2) de Havilland Aero Engine Gipsy Queen 30 Mark 2 Operation, Maintenance and Overhaul Manual. (3) Publication 5030 for Series 2A, 2DA and 2X with feathering propellers, or D.H. Heron Publication 2BCS for Series 2X with non-feathering propellers. (4) A.R.B. approved Flight Manual for Heron Series 2A (Doc. D.H. 1.4) or (5) A.R.B. approved Flight Manual for Heron Series 2DA (Doc. No. D.H.1.4). or (6) A.R.B. approved Flight Manual for Heron Series 2X with non-feathering propellers (Doc. No. D.H.1.4) (Amend P/7 and P/8) or with feathering propellers (Doc. No. D.H.1.4) (Amend P/7, P/8 and P/10) Certification basis CAR 10. Type Certificate No. A-816 issued June 24, 1957. (This certification equivalent to CAR 4b effective December 31, 1953, plus Amendment 4b-1) Import requirements Each aircraft and any replacement parts manufactured in the United Kingdom must be clearly identified as imported. A U.S. airworthiness certificate may be issued on basis of a United Kingdom certificate of airworthiness signed by a representative of the Ministry of Aviation containing the following notation: "The aircraft covered by this certificate has been examined and found to comply with British Civil Airworthiness Requirements published January, 1948, and with the special requirements notified by the United States Government to the Government of the United Kingdom and conforms to T.C. A-816". Refer to the applicable bilateral agreement to verify eligibility for import into the United States of both new and used aircraft based on the scope of the agreement, to identify any required statements by the exporting authority on the export certificate of airworthiness (or equivalent document), and for procedures for coordinating exceptions to conformity statements on these documents. Refer to FAA Order 8130.2, Airworthiness Certification of Aircraft, for requirements for issuance of an airworthiness certificate for imported aircraft. Service Information Each of the documents listed below may state that it is approved by the United Kingdom Civil Aviation Authority (UK CAA). • Service bulletins • Structural repair manuals • Vendor manuals • Aircraft flight manuals • Overhaul and maintenance manuals The FAA accepts such documents and considers them FAA -approved for type design data unless one of the following conditions exist: • The documents change the limitations, performance, or procedures of the FAA approved manuals. The FAA uses post type validation procedures to approve these documents. The FAA may delegate case-by-case approval to the UK CAA on behalf of the FAA for the U.S. type certificate. If this is the case it will be noted on the document. NOTES NOTE 1. Current weight and balance report including list of equipment included in certificated weight empty, and loadinginstructions when necessary, must be provided for each aircraft at the time of original certification. NOTE 2. The following placards must be displayed as indicated: (a) In front of and in plain view of the pilot: "This airplane must be operated in compliance with the operating limitations specified in the A.R.B. Approved Flight Manual for Heron Series 2A" (or "Heron Series 2DA" or "Heron Series 2X" when applicable.) (b) On the lavatory door: "This room must not be occupied during takeoff and landing." 5 A-816 NOTE 3. The following partial flap setting and corresponding limiting airspeed may be used: 20° 135 knots I.A.S. NOTE 4. NOTE 5. Smoking may be permitted in passenger compartment only, except during takeoff and landing. Heron 2X airplanes are eligible for issuance of a U.S. airworthiness certificate in accordance with the certification basis defined in this specification at a maximum weight of 12,499 lb. When any Heron 2X airplane incorporates all the modifications shown in de Havilland Document No.: M.60343 Issue 7 it may be designated as a Heron 2DA. ....END..... ``` ## ADs (36, in force first) - [AD 84-20-04](https://openairdocs.org/ad/84-20-04): Eyebolt Holes Modification · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Nov 5, 1984 - [AD 81-21-03](https://openairdocs.org/ad/81-21-03): Wing Leading Edge Access Doors · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Oct 18, 1981 - [AD 76-16-03](https://openairdocs.org/ad/76-16-03): Wing to Fuselage Attachment · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Feb 8, 1979 - [AD 77-15-13](https://openairdocs.org/ad/77-15-13): Main Landing Gear Damper Ram · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Aug 24, 1977 - [AD 77-14-04](https://openairdocs.org/ad/77-14-04): Electrical Power · de Havilland Aircraft Co., Ltd., The D.H. 104 Dove Series 1A, D.H. 104 Dove Series 2A, D.H. 104 Dove Series 5A and 10 more. Effective Aug 5, 1977 - [AD 77-12-03](https://openairdocs.org/ad/77-12-03): Engine Mount Stay Strut · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jul 18, 1977 - [AD 77-13-14](https://openairdocs.org/ad/77-13-14): Drag Brace Fittings · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jul 7, 1977 - [AD 76-07-04](https://openairdocs.org/ad/76-07-04): Nose Landing Gear · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Apr 12, 1976 - [AD 75-27-03](https://openairdocs.org/ad/75-27-03): Nose Gear Screw · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jan 19, 1976 - [AD 75-24-10](https://openairdocs.org/ad/75-24-10): Wing Structure · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Dec 1, 1975 - [AD 75-16-22](https://openairdocs.org/ad/75-16-22): Counterweight Bushings · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X with STC SA1685WE. Effective Aug 8, 1975 - [AD 73-17-03](https://openairdocs.org/ad/73-17-03): Flap Hinge-to-Wing Attachments · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Sep 13, 1973 - [AD 73-13-06](https://openairdocs.org/ad/73-13-06): Aileron and Rudder Trim · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jun 23, 1973 - [AD 72-07-03](https://openairdocs.org/ad/72-07-03): Main Air Reservoir Assemblies · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Sep 1, 1972 - [AD 72-15-01](https://openairdocs.org/ad/72-15-01): Wing to Fuselage Attach Bolts · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jul 11, 1972 - [AD 72-08-02](https://openairdocs.org/ad/72-08-02): Main and Damper Jack Bolts · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective May 1, 1972 - [AD 72-08-03](https://openairdocs.org/ad/72-08-03): Rudder Control Pedal · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective May 1, 1972 - [AD 72-09-04](https://openairdocs.org/ad/72-09-04): Fuselage Keel Frame · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Apr 25, 1972 - [AD 72-06-03](https://openairdocs.org/ad/72-06-03): Corrosion in Engine Mount · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Apr 6, 1972 - [AD 72-06-04](https://openairdocs.org/ad/72-06-04): Main Undercarriage Down Lock Lever · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Apr 6, 1972 - [AD 71-20-02](https://openairdocs.org/ad/71-20-02): Emergency Escape Hatches · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Sep 23, 1971 - [AD 71-13-03](https://openairdocs.org/ad/71-13-03): Dunlop Air Bottles · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jul 31, 1971 - [AD 70-21-04](https://openairdocs.org/ad/70-21-04): Fin to Fuselage Attachment · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Nov 5, 1970 - [AD 70-21-05](https://openairdocs.org/ad/70-21-05): Flap Datum Hinge Assemblies · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Nov 5, 1970 - [AD 70-10-07](https://openairdocs.org/ad/70-10-07): Nose Gear Locking Lever · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Aug 11, 1970 - [AD 69-25-07](https://openairdocs.org/ad/69-25-07): Aileron Lever · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Jan 3, 1970 - [AD 69-26-02](https://openairdocs.org/ad/69-26-02): Engine Mount Wing Straps · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Dec 18, 1969 - [AD 66-20-03](https://openairdocs.org/ad/66-20-03): Engine Fire Extinguishing System · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Aug 13, 1966 - [AD 65-08-01](https://openairdocs.org/ad/65-08-01): Main Ground Assembly · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective May 3, 1965 - [AD 64-19-02](https://openairdocs.org/ad/64-19-02): Trim Tab Rod Assembly · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Sep 7, 1964 - [AD 63-15-02](https://openairdocs.org/ad/63-15-02): Bolt Attaching Flap Jack to Wing · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Aug 22, 1963 - [AD 61-23-03](https://openairdocs.org/ad/61-23-03): Wing Rear Spar · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X. Effective Dec 4, 1961 - [AD 70-07-06](https://openairdocs.org/ad/70-07-06): Tailplane Rear Spar · de Havilland Aircraft Co., Ltd., The D.H. 104 Dove Series 1A, D.H. 104 Dove Series 2A, D.H. 104 Dove Series 5A and 10 more - [AD 70-15-08](https://openairdocs.org/ad/70-15-08): Wing Flap Datum Hinge Links · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X - [AD 72-12-05](https://openairdocs.org/ad/72-12-05): Landing Gear Jack Assemblies · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X - [AD 72-20-01](https://openairdocs.org/ad/72-20-01): Failure of Airplane Structure · de Havilland Aircraft Co., Ltd., The D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA and D.H.114 Heron Series 2X ## Registered aircraft by registry model (OpenAirDocs) - [Dehavilland DH 114 HERON 2X](https://openairdocs.org/model/dehavilland-dh-114-heron-2x): 1 aircraft (registry code 2800508) - [Dehavilland D H 114 HERON 2DA](https://openairdocs.org/model/dehavilland-d-h-114-heron-2da): 0 aircraft (registry code 2800503) - [Dehavilland DH114 HERON 2A](https://openairdocs.org/model/dehavilland-dh114-heron-2a): 0 aircraft (registry code 2800502) ## STCs approved under this data sheet (39) - [STC SA02283SE PAGE 2](https://openairdocs.org/stc/SA02283SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc. - [STC SA02402SE PAGE 1](https://openairdocs.org/stc/SA02402SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc. - [STC SA01988SE](https://openairdocs.org/stc/SA01988SE): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P.. Electronics International Inc. - [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.. Electronics International - [STC SA2-965](https://openairdocs.org/stc/SA2-965): Installation of American Generator Control system.. Gulfstream Aerospace Corporation - [STC SA2-597](https://openairdocs.org/stc/SA2-597): Installation of Lear Model L2C autopilot.. Signature Flight Support Corporation - [STC SA249SW](https://openairdocs.org/stc/SA249SW): Installation of airstair door.. Signature Flight Support Corporation - [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer.. Electronics International - [STC SA1138SO](https://openairdocs.org/stc/SA1138SO): Installation of Bendix RDR 160B NM-Lather radar system.. Puerto Rico Intl Airlines, Inc - [STC ST965SO](https://openairdocs.org/stc/ST965SO): Modification of cockpit direct vision window.. Puerto Rico Intl Airlines Inc - [STC ST957SO](https://openairdocs.org/stc/ST957SO): Installation of Teledyne battery Model BB638/T-C replacing two Rebat R-35 batteries.. Puerto Rico Intl Airlines Inc - [STC SA919SO](https://openairdocs.org/stc/SA919SO): Airplane life extension.. Puerto Rico Intl Airlines Inc - [STC ST758SO](https://openairdocs.org/stc/ST758SO): Metal covering of wing flaps.. Puerto Rico Intl Airlines Inc - [STC SA757SO](https://openairdocs.org/stc/SA757SO): Installation of emergency exit RH fuselage at F.S. 49-76, and permanent closure of three existing overhead exits.. Puerto Rico Intl Airlines Inc - [STC SA1368WE](https://openairdocs.org/stc/SA1368WE): Installation of Lycoming IO-540 series engines.. Riley Turbostream Corp - [STC SA3125WE](https://openairdocs.org/stc/SA3125WE): Installation of lower wing skin straps, lower spar doubler straps and engine mount pickup strap doublers.. Winters Aircraft Engr Co - [STC SA1089SO](https://openairdocs.org/stc/SA1089SO): Installation of shoulder harness for crew seats.. Puerto Rico Intl Airlines, Inc - [STC ST744SO](https://openairdocs.org/stc/ST744SO): Installation of smoke detection system for forward and aft holds.. Puerto Rico Intl Airlines Inc - [STC ST745SO](https://openairdocs.org/stc/ST745SO): Installation of windshield wiper for co-pilot's (R.H.) position.. Puerto Rico Intl Airlines Inc - [STC SA629SO](https://openairdocs.org/stc/SA629SO): Installation of Hartzell propellers HC-A3VK-2/V8433-7 equipped with Goodyear deicing equipment.. Riley Turbostream Corp - [STC SA2805WE](https://openairdocs.org/stc/SA2805WE): Nickel cadmium battery installation.. Aircraft Technical Service Inc - [STC SA2806WE](https://openairdocs.org/stc/SA2806WE): Installation of additional emergency exits.. Aircraft Technical Service Inc - [STC SA1323WE](https://openairdocs.org/stc/SA1323WE): Fabric on ailerons, elevators, flaps and rudder with pop rivets.. Aircraft Technical Service Inc - [STC SA1729WE](https://openairdocs.org/stc/SA1729WE): Installation of over wing emergency exits and rear windows.. Puerto Rico Intl Airlines Inc - [STC SA1685WE](https://openairdocs.org/stc/SA1685WE): Installation of four Continental IO-520-E engines.. Puerto Rico Intl Airlines - [STC SA1545WE](https://openairdocs.org/stc/SA1545WE): Installation of cabin interior arrangement, air conditioning equipment, electrically operated air compressors.. Aircraft Technical Service Inc - [STC SA816WE](https://openairdocs.org/stc/SA816WE): Hartzell HC-A3X21-2L/L7636D propellers.. Schachle Charles - [STC SA1228WE](https://openairdocs.org/stc/SA1228WE): Ceconite 101 covering of flaps and control surfaces.. Cooper Engineering Corporation - [STC SA1371WE](https://openairdocs.org/stc/SA1371WE): Interior installation.. Aircraft Technical Service Inc - [STC SA1534WE](https://openairdocs.org/stc/SA1534WE): Installation of engine fire detection and extinguishment systems.. Aircraft Technical Service Inc - [STC SA1535WE](https://openairdocs.org/stc/SA1535WE): Installation of combustion cabin heater.. Aircraft Technical Service Inc - [STC SA1544WE](https://openairdocs.org/stc/SA1544WE): Cockpit modification and generator control.. Aircraft Technical Service Inc - [STC SA1710WE](https://openairdocs.org/stc/SA1710WE): Installation of stair door.. Aircraft Technical Service Inc - [STC SA1826WE](https://openairdocs.org/stc/SA1826WE): Installation of 22 occupant interior.. Aircraft Technical Service Inc - [STC SA2067WE](https://openairdocs.org/stc/SA2067WE): Installation of Janitrol 8-200 cabin heater.. Riley Turbostream Corp - [STC SA633SO](https://openairdocs.org/stc/SA633SO): Installation of electrically heated windshield.. Riley Turbostream Corp - [STC SA740EA](https://openairdocs.org/stc/SA740EA): Installation substitution of Lycoming engine IO-540-K1C5 in place of Lycoming Model IO-540-G1A4.. Wright Airlines Inc - [STC SA2-1179](https://openairdocs.org/stc/SA2-1179): Installation of McMillan Radome P/N 7191X and relocate pneumatic system. Associated Air Center, Inc. - c/o CT Corporation System --- 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.