# TCDS AR-33: Civil Air Patrol Incorporated - Type: Type certificate data sheet - Status: Current - Holder: Civil Air Patrol Incorporated - Revision: 1 - Revised: February 4, 1963 - Product: Aircraft, Small Airplane - Certification basis: CAR 8 - Data sheet PDF: https://openairdocs.org/files/sha256/90/9f/909f276dae4a72f8c7739be209b9184dd136a49dcc32ec3205d30d26c33f5cbf - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/958E9460CFFAF72D8525673200694C7C.0001 - Page: https://openairdocs.org/tcds/AR-33 ## Models (1) As the data sheet lists them. - L-20A ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text Page No. 1 2 3 4 Rev. No. 1 - - - FEDERAL AVIATION AGENCY AR-33 Revision 1 DE HAVILLAND L-20A February 4, 1963 TYPE CERTIFICATE DATA SHEET NO. AR-33 This data sheet which is a part of type certificate No. AR-33 prescribes conditions and limitations under which the product for which the type certificate was issued meets the airworthiness requirements of the Civil Air Regulations. Type Certificate Holder Civil Air Patrol, Incorporated P.O. Box 1836 Anchorage, Alaska I - Model L-20A (Restricted Category), Approved April 1, 1960 Engine Pratt and Whitney Wasp Jr. H-985-AN-1, -AN-3, -39, -39A, -AN-14B Fuel 80/87 minimum grade aviation gasoline Engine limits (Straight line manifold pressure variation with altitudes shown) MP HP RPM In.Hg. Alt. Maximum continuous 400 2200 34.5 S.L. 400 2200 33.5 5000 Takeoff (one min.) 450 2300 36.5 S.L. Propeller Hamilton Standard 2D30/6101A-18 or 2D30/6167A-12 Airspeed limits Never exceed 199 m.p.h. (173 knots) Maximum all flap positions 110 m.p.h. ( 96 knots) C.G. range Landplane and Skiplane (+101.3) to (+107.7) at 5100 lbs. (+93.4) to (+107.7) at 3800 lb. or less (Straight line variation between points given) Seaplane (+101.3) to (+106.1) at 5090 lb. (+93.4) to (+106.1) at 3800 lb. or less (Straight line variation between points given) Empty wt. C.G. range None Datum 82.5 in. forward of wing leading edge Leveling means Use cabin floor for lateral and longitudinal Maximum weight Landplane 5100 lb. Seaplane 5090 lb. No. of seats 6.2 (+93), 2 (+129), 2 (+165) Maximum baggage 146 lb. (+194); to be reduced to 97 lb. when DH Mod. 2/1307 is compartment capacity incorporated. This compartment to be used for equipment necessary for the approved special purpose. AR-33 Page 2 Fuel capacity 95 gal. total One tank 35 gal. ( +95.5) One tank 35 gal. (+119.6) One tank 25 gal. (+140.0) Oil capacity 6.25 gal. (+63.0) Other operating limitations USAF Flight Handbook T.O. 1L-20A-1 Control surface movements Wing flaps Down 58 degrees Aileron droop Down 15 degrees max. (wing flaps fully down) Aileron Up 18 degrees Down 11 degrees Elevator Up 28 degrees Down 23 degrees Elevator tab Up 18 degrees Down 26 degrees Rudder Right 25 degrees Left 25 degrees Rudder tab Right 18 degrees Left 18 degrees Serial Nos. eligible All USAF serial Nos. Certification basis CAR 8 as amended to October 11, 1950. Type Certificate No. AR-33 issued April 1, 1960, for the special purpose of search and rescue or pest control Date of Application for Type Certificate February 29, 1960 Production basis None. No aircraft may be produced under this approval. Equipment The basic required equipment as prescribed in the applicable airworthiness regulations (see certification basis) must be installed in the aircraft for certification. In addition, equipment necessary for the particular special purpose must be installed. NOTE 1. Current weight and balance report including list of equipment included in the certificated empty weight, and loading instructions when necessary, must be provided for each aircraft at the time of original certification. NOTE 2. The following placards and/or markings must be prominently displayed in both cockpits in full view of pilots: (a) "This airplane approved in restricted category for (indicate special purpose)." (b) "This airplane must be operated within the limitations set forth in USAF Flight Handbook. T.O. 1L-20A-1 except for limitations specifically called out in FAA type certificate data sheet AR-33, in which case values in the data sheet must be observed." (c) "Do not extend flaps above 110 MPH (96 knots)." NOTE 3. Prior to civil certification, the following must be accomplished: (a) Install stainless steel self-locking nuts on engine exhaust port studs in accordance with T.O. 1L-1-201. (b) Install reinforcing plates on lower wing skin in accordance with T.O. 1L-20-34. AR-33 Page 3 (c) Modify fuel selector handle in accordance with T.O. 1L-20-44. (d) Inspect wing rear spar to fuselage attachment in accordance with T.O. 1L-20-212. (e) Install "No Smoking" placard and inspect for fuel leaks in accordance with T.O. 1L- 20-219. (f) Inspect flight control cable turnbuckles in accordance with T.O. 1L-20-503. (g) Replace fuel selector valve detent plate in accordance with T.O. 1L-20-515. (h) Modify rudder pedals and supports in accordance with T.O. 1L-20-518,A. (i) Reinforce forward floor structure and modify passenger seats in accordance with T.O. 1L-20-524. (j) Modify fuel tank filler deck. Recess box in accordance with T.O. 1L-20A-201. (k) Modify fuel selector valve in accordance with T.O. 1L-20A-205. (l) Modify seat catch assembly in accordance with T.O. 1L-20A-502. (m) Install close tolerance bolt in wing strut and wing to fuselage attachments in accordance with T.O. 1L-20A- 503,A. (n) Modify rudder assembly in accordance with T.O. 1L-20A-512,A. (o) Reinforce rear fuselage structure in accordance with T.O. 1L-20A-512,A. (p) Inspect fuselage-tailplane joint attachment bracket in accordance with T.O. 1L-20A- 521. (q) Install ratchet valve in flap hydraulic system in accordance with T.O. 1L-20A-523,A. (r) Modify fuel line installation in accordance with T.O. 1L-20A-526. (s) Modify roof window installation in accordance with T.O. 1L-20A-531,A. (t) Install reinforcing gussets on tailplane spar in accordance with T.O. 1L-20A-533. (u) Reinforce fuselage front bulkhead in accordance with T.O. 1L-20A-537. (v) Reinforce canted bulkhead in accordance with T.O. 1L-20A-540,A. (w) Install redesigned horizontal stabilizer attach bracket in accordance with T.O. 1L- 20A-543,A,B. (x) Modify outboard end of horizontal stabilizer in accordance with T.O. 1L-20A-544. (y) Check compliance with all pertinent airworthiness directives on de Havilland models DHC-2 Mk1 and Mk2. NOTE 4. To comply with CAR 8.10(a)(2), the modifications made on this type aircraft for search and rescue use, and the technical data approved are as follows: (a) Tail position light modified to restrict side vision as required in TS O-C30b. Civil Air Patrol Dwg. No. 1 dated 31 Mar. 1960. (b) Seats modified by removing parachutes and installing floatation cushions. Civil Air Patrol letter to Safety Office, FAA, Anchorage, dated 6 June 1960. (c) Nylon tie-down straps installed as per above letter. (d) Baggage compartment placard per above letter. (e) Loading schedule installed per above letter. AR-33 Page 4 (f) Belly fuel tank removed per AF Technical Order 1L-20A-2. For use as a sprayer, installation of the unit described by deHavilland Dwg. C2-M-2079, Spray Installation, dated 16-7-53 is required, in addition to the above modifications. -END- ``` ## ADs None name its models. ## Registered aircraft by registry model (OpenAirDocs) - [Dehavilland L20A](https://openairdocs.org/model/dehavilland-l20a): 0 aircraft (registry code 2808004) ## STCs approved under this data sheet (12) - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation - [STC SA1649GL](https://openairdocs.org/stc/SA1649GL): Installation of Sky-Tractor model 500 scavenge oil filter system with P&W model R-985 engines.. Airwolf Filter Corp - [STC SA6070NM](https://openairdocs.org/stc/SA6070NM): Installation of a 'quick-disconnect drain plug' on the engine rocker sump for the oil drain retrieval system after engine shutdown.. West Coast Air Creations - [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830.. Airwolf Filter Corporation - [STC SA02428SE](https://openairdocs.org/stc/SA02428SE): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft. Henry F Rogers/David E Polley - [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 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 SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc. - [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc - [STC SA01157LA](https://openairdocs.org/stc/SA01157LA): Installation of Electronics International Model FP-5 or FP-5L fuel flow/fuel pressure instrument as a replacement instrument.. Electronics International Inc. - [STC SA02099AK](https://openairdocs.org/stc/SA02099AK): Installation of hourmeter airspeed switch.. Avalaska Inc - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer.. Electronics International --- 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.