# TCDS E26NE: Pratt & Whitney Canada Corp.

- Type: Type certificate data sheet
- Status: Current
- Holder: Pratt & Whitney Canada Corp.
- Revision: 22
- Revised: February 9, 2022
- Product: Engine
- Certification basis: Part 33
- Registered aircraft: 2,546, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/07/78/0778ee0ee3f1d216f8064bd5c585439109de2a4023ee138c2ae6183a9f6cf38c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E3880B97E62038E18625880600710A51.0001
- Page: https://openairdocs.org/tcds/E26NE

## Models (20)

As the data sheet lists them.

- PT6A-67AG
- PT6A-64
- PT6A-67RM
- PT6A-67F
- PT6A-67P
- PT6A-67R
- PT6A-67
- PT6A-66
- PT6A-67D
- PT6A-66A
- PT6A-68
- PT6A-66D
- PT6A-66B
- PT6A-67A
- PT6A-67B
- PT6A-67AF
- PT6A-67T
- PT6E-67XP
- PT6A-68D
- PT6E-66XT

## What the data sheet says

From the PDF's text layer, line by line; tables lose their columns. The PDF is the record.

```text
U.S. DEPARTMENT OF TRANSPORTATION 
 
FEDERAL AVIATION ADMINISTRATION 
 
TYPE CERTIFICATE DATA SHEET 
 
E26NE 
TCDS NUMBER E26NE 
REVISION: 22 
 
DATE  February 9, 2022 
PRATT & WHITNEY CANADA CORP. 
MODELS: 
PT6A-66 PT6A-67B   PT6A-68 
PT6A-66A PT6A-67D  PT6A-67AG 
PT6A-67 PT6A-67R   PT6A-67T 
PT6A-67A PT6A-64    PT6A-66D 
PT6A-67AF PT6A-66B  PT6A-67F  
PT6A-67P PT6A-67RM PT6E-67XP 
PT6A-68D  PT6E-66XT 
 
 
Engines of models described herein conforming with this data sheet (which is part of Type Certificate Number E26NE) and other approved 
data on file with the Federal Aviation Administration, meet the minimum standards for use in certificated aircraft in accordance with 
pertinent aircraft data sheets and applicable portions of the Federal Aviation Regulations, provided they are installed, operated, and 
maintained as prescribed by the approved manufacturer's manuals and other approved instructions. 
 
TYPE CERTIFICATE (TC) HOLDER:    Pratt & Whitney Canada Corp. 
1000 Marie Victorin 
Longueuil, QC, Canada J4G 1A1 
  
TYPE A free turbine turbo-propeller propulsion engine incorporating a multi-stage compressor driven 
by a single-stage turbine and a two-stage free turbine driving the propeller shaft through 
planetary reduction gearing. The PT6A-68 and -68D have an electronic Power Management 
System with mechanical back up. The PT6E-67XP and PT6E-66XT have an Engine and 
Propeller Electronic Control System (EPECS) and associated hardware. 
 
MODELS PT6A- 
66 
PT6A- 
67 
PT6A- 
67A 
PT6A
- 67R 
PT6A-
67RM 
PT6A- 
67T 
PT6A- 
64 
PT6A- 
66B 
 
RATINGS (see NOTE 1) 
Maximum Continuous at sea level 
Equivalent shaft horsepower 
Shaft Horsepower 
Thrust, pounds 
Output, RPM (maximum) 
Gas gen. RPM (maximum) 
 
Takeoff (5 min. at sea level) 
Equivalent shaft horsepower 
Shaft horsepower 
Thrust, pounds 
Output, RPM (maximum)  
Gas gen., RPM (maximum) 
 
Alternate takeoff (5 min. at sea level) 
Equivalent shaft horsepower 
Shaft horsepower 
Thrust, lbs. 
Output, RPM (maximum) 
Gas gen. RPM (maximum) 
 
Maximum Reverse 
Shaft horsepower 
Output, RPM (maximum) 
        
 
 
905 
 
 
1,272 
 
 
- - 
 
 
1,294 
 
 
- - 
 
 
- - 
 
 
747 
 
 
1010 
850 1,200 - - 1,220 - - - - 700 950 
138 181 - - 184 - - - - 119 150 
2,000 1,700 - - - - - - - - 2,000 - - 
39,000 - - - - - - - - - - - - - - 
 
905 
 
1,272 
 
- - 
 
1,509 
 
- - 
 
- - 
 
747 
 
1010 
850 1,200 - - 1,424 - - - - 700 950 
138 181 - - 212 - - - - 119 150 
2,000 1,700 - - 1,700 - - - - 2,000 - - 
39,000 - - - - - - - - - - - - - - 
 
--- 
 
--- 
 
--- 
 
1,358 
 
- - 
 
--- 
 
--- 
 
--- 
--- --- --- 1,281 - - --- --- --- 
--- --- --- 192 - - --- --- --- 
--- --- --- 1,700 - - --- --- --- 
--- --- --- 39,000 - - --- --- --- 
 
800 
 
900 
 
- - 
 
- - 
 
- - 
 
- - 
 
700 
 
800 
1,900 1,650 - - - - - - - - 1,900 - - 
+ 
PAGE 1 2 3 4 5 6 7 
REV. 22 22 21 21 22 22 21 
PAGE 8 9 10 11 12 13  
REV. 22 22 21 21 22 22  
 
 
 ;  
 
LEGEND: "- -" INDICATES "SAME AS PRECEDING MODEL" 
              "---" NOT APPLICABLE  
NOTE: CHANGES, ARE BLACK-LINED IN THE LEFT MARGIN.

TCDS E26NE PAGE 2 
 
 
 
MODELS (continued) 
 
RATINGS (see NOTE 1) 
Maximum Continuous at sea level 
Equivalent shaft horsepower  
Shaft Horsepower 
Thrust, pounds 
Output, RPM (maximum)  
Gas gen. RPM (maximum) 
 
Takeoff (5 min. at sea level)   
Equivalent shaft horsepower  
Shaft horsepower 
Thrust, pounds 
Output, RPM (maximum)  
Gas gen., RPM (maximum) 
 
Maximum Reverse  
Shaft horsepower 
Output, RPM (maximum) 
 
 
 
MODELS (continued) 
 
RATINGS (see NOTE 1) 
Maximum Continuous at sea level 
Equivalent shaft horsepower  
Shaft Horsepower 
Thrust, pounds 
Output, RPM (maximum)  
Gas gen. RPM (maximum) 
 
Takeoff (5 min. at sea level)   
Equivalent shaft horsepower  
Shaft horsepower 
Thrust, pounds 
Output, RPM (maximum)  
Gas gen., RPM (maximum) 
 
Maximum Reverse  
Shaft horsepower 
Output, RPM (maximum) 
 
 
 
COMPONENTS/ 
CONFIGURATION 
Fuel pump, fuel control unit, ignition system without power source, 
propeller governor and fuel heater are included as standard equipment as 
shown in the approved Parts List.  The PT6E-67XP and PT6E-66XT 
models include an Engine and Propeller Electronic Control System 
(EPECS) and associated hardware.  
For additional information, refer to Installation Manual. For output drive 
specifications and C.G. location, refer to Installation Manual. 
 
 
  
PT6A- 
67B 
PT6A- 
67D 
PT6A- 
67AG 
PT6A- 
68 
PT6A- 
66A 
PT6A- 
66D 
PT6A- 
67AF 
PT6A- 
67F 
 
 
1,272 
 
 
1,285 
 
 
1,294 
 
 
1,324 
 
 
905 
 
 
- - 
 
 
1294 
 
 
1796 
1,200 1,214 1,220 1,250 850 - - 1220 1700 
181 178 184 185 138 137 184 241 
1,700 - - - - 2,000 - - - - 1700 - - 
39,000 - - - - - - - - - - - - - - 
 
1,272 
 
1,353 
 
1,430 
 
1,324 
 
905 
 
- - 
 
1509 
 
1796 
1,200 1,279 1,350 1,250 850 - - 1424 1700 
181 186 200 185 138 137 212 241 
1,700 1,700 1,700 2,000 - - - - 1700 - - 
39,000 - - - - - - - - - - - - - - 
 
900 
 
- - 
 
- - 
 
--- 
 
800 
 
- - 
 
900 
 
- - 
1,650 - - - - --- 1900 - - 1650 - - 
 
 
 
 
 
 
 
 
 
 
 
PT6A-
67P 
PT6E- 
67XP 
PT6A-
68D 
PT6E-
66XT 
 
 
1272 
 
 
- - 
 
 
1691 
 
 
 
 
952 
1200 - - 1600 895 
181 - - 228 143 
1700 - - 2000 - - 
39,000 - - - - 
 
 
 
- - 
 
1272 
 
- - 
 
1691 
 
952 
 1200 - - 1600 895 
181 - - 228 143 
1700 - - 2000 - - 
39,000 - - - - - - 
 
900 
 
- - 
 
--- 
 
800 
1650 - - --- 1,800

TCDS E26NE PAGE 3 
 
 
FUEL Fuels conforming to the current P&WC specifications CPW 204 and 
CPW 46. Refer to the current revision of Service bulletin 14004 for all 
models except for the PT6A-67AG and PT6A-68. For the PT6A-67AG 
and PT6A-67F refer to Service Bulletin 14504 and for the PT6A-68, refer 
to Service Bulletin 18004. For the PT6E-67XP, refer to Maintenance 
Manual 3076392. For the PT6A-68D, refer to SB 18104. For the PT6E-
66XT, refer to Maintenance Manual 3134822. Refer to the Installation 
Manuals for further details.  
 
LUBRICATING OILS Oils conforming to PWA specification PWA 521 Type II. Refer to the 
current revision of P&WC Service Bulletin 14001 for acceptable 
lubrication for all models except the PT6A-68. For the PT6A-68, refer to 
Service Bulletin 18001. For the PT6E-67XP, refer to Maintenance 
Manual 3076392. For the PT6A-68D, refer to SB 18101.  For the PT6E-
66XT, refer to Maintenance Manual 3134822. 
 
PRINCIPAL DIMENSIONS AND WEIGHT 
  PT6A- 
 66 
 PT6A- 
 67 
 PT6A- 
 67A 
 PT6A- 
 67R 
 PT6A- 
 67RM 
 PT6A- 
 67T 
 PT6A- 
 64 
 PT6A- 
 66B 
 PT6A- 
 67B 
 PRINCIPAL DIMENSIONS AT ROOM TEMPERATURE / INCHES / NOMINAL 
 Diameter 
 Length 
 
 
18.3 
69.7 
- - 
74.2 
- - 
- - 
- -  
75.2 
- - 
- - 
- - 
- - 
- - 
69.7 
- - 
- - 
- - 
 76.0 
 WEIGHT / DRY / POUNDS / INCLUDING EXTERNAL ENGINE ACCESSORIES 
 Standard rotation 
 Reverse rotation 
469 
483 
523 
--- 
- - 
--- 
531 
--- 
- - 
--- 
- - 
--- 
474 
--- 
469 
483 
592 
--- 
 Reduction Ratio (Np:Nf) 0.0663:1 0.0568:1 - - - - - - - - 0.0663:1 - - .0568:1 
 
 
PRINCIPAL DIMENSIONS AND WEIGHT (continued) 
  PT6A- 
67D 
 PT6A- 
67AG 
 PT6A- 
68 
 PT6A- 
66A 
 PT6A- 
66D 
 PT6A- 
67AF 
 PT6A- 
67F 
 PT6A- 
67P 
 PT6E- 
67XP 
 PRINCIPAL DIMENSIONS AT ROOM TEMPERATURE/ INCHES/ NOMINAL 
 Diameter 
 Length 
 
18.3 
74.2 
- -  
75.2 
22.2 
71.3 
18.3 
69.9 
- - 
- - 
- -  
75.2 
- - 
- - 
- - 
76.0 
18.9 
73.7 
 WEIGHT/ DRY/ POUNDS/ INCLUDING EXTERNAL ENGINE ACCESSORIES 
 Standard rotation 
 Reverse rotation 
533 
--- 
523 
--- 
586 
--- 
474 
--- 
475 
--- 
548 
--- 
590 
--- 
563 
--- 
598 
--- 
Reduction Ratio (Np:Nf) 0.0568:1 - - 0.0667:1 0.0663:1 - - 0.0568:1 0.0575:1 0.0568:1 - - 
 
 
PRINCIPAL DIMENSIONS AND WEIGHT (continued) 
 PT6A- 
68D 
PT6E-
66XT 
 PRINCIPAL DIMENSIONS AT ROOM TEMPERATURE/ INCHES/ NOMINAL 
 Diameter 
 Length 
 
22.4 
71.7 
18.9 
67.9 
 WEIGHT/ DRY/ POUNDS/ INCLUDING EXTERNAL ENGINE ACCESSORIES 
 Standard rotation 
 Reverse rotation 
606 
--- 
533 
Reduction Ratio (Np:Nf) .0667:1 .0670:1

TCDS E26NE PAGE 4 
 
 
CERTIFICATION BASIS 
 
MODELS 
 
All models except for those 
listed below. 
PT6A-68 
 
PT6A-66D, PT6-66B, PT6A-
67F, PT6A-67P, PT6A-
67RM and PT6A-68D 
 
PT6E-67XP and PT6E-66XT 
 
 
Airworthiness Standards 
 
14 CFR Part 33 effective February 1, 1965, Amendments 33-1 to 33-10. 
 
14 CFR Part 33 effective February 1, 1965, Amendments 33-1 to 33-14. 
 
14 CFR Part 33 effective February 1, 1965, Amendments 33-1 to 33-20. 
 
 
 
14 CFR Part 33 effective February 1, 1965, Amendments 33-1 to 33-33. 
 
Emissions Standards 
1. All models comply with the applicable requirements of 14 CFR Part 34 effective 
October 23, 2013, Amendments 34-1 to 34-5A inclusive. 
a. All models comply with the fuel venting requirements of Subpart B of 14 CFR Part 
34, effective October 23, 2013, Amendments 34-1 to 34-5A, inclusive. 
b. The following models comply with the exhaust emissions smoke requirement of 
Subpart C of 14 CFR Part 34, effective October 23, 2013, Amendments 34-1 to 34-5A, 
inclusive:  PT6A-67R, PT6A-67RM, PT6A-67T, PT6A-67AG, PT6A-67AF, PT6A-67F and 
PT6A-68D, 
 
 
MODEL APPLICATION DATE ISSUED/REVISED 
PT6A-66 MAR 27, 1985 MAR 16, 1987 
PT6A-67 MAR 27, 1985 MAR 16, 1987 
PT6A-67R AUG 05, 1985 MAR 16, 1987 
PT6A-67A JUL 05, 1987 DEC 22, 1987 
PT6A-64 DEC 06, 1989 APR 09, 1990 
PT6A-67B SEP 12, 1990 MAR 05, 1991 
PT6A-67D SEP 12, 1990 MAR 05, 1991 
PT6A-67AG MAY 16, 1994 JUNE 23, 1994 
PT6A-68 JUNE 11, 1996 JUNE 30, 1997 
PT6A-66A NOV 10, 1998 MAR 11, 1999 
PT6A-67T NOV 5, 1999 NOV 29, 2000 
PT6A-66D MAY 17, 2005 NOV 21, 2005 
PT6A-66B APRIL 3, 2006 JAN 29, 2007 
PT6A-67AF MAY 17, 2006 JAN 29, 2007 
PT6A-67F OCT 5, 2006 AUG 2, 2007 
PT6A-67P FEB 9, 2007 NOV 19, 2007 
PT6A-67RM MAY 29, 2009 NOV. 4, 2011 
PT6E-67XP JAN 31, 2018 OCT 15, 2019 
PT6A-68D AUG 28, 2020 MAY 11, 2021 
PT6E-66XT OCT 28, 2019 OCT 28, 2021 
   
 
 
 
NOTES 
 
NOTE 1. ENGINE RATINGS: 
 
The engine ratings are based on dry sea level static ICAO standard atmospheric conditions. No external accessory 
loads and no air bleed. The quoted ratings are obtained on a test stand with the specified fuel and oil, without 
intake ducting and utilizing the exhaust port and intake defined in the approved installation manual.

TCDS E26NE PAGE 5 
 
 
NOTE 2. TEMPERATURES 
 
  MODELS PT6A- 
66 
PT6A- 
67 
PT6A- 
67A 
PT6A
- 67R 
PT6A-
67RM 
PT6A- 
67T 
PT6A- 
64 
PT6A- 
66B 
Limitations 
Maximum Continuous 
Maximum interturbine temp (ITT) 
Maximum air inlet temp (AIT)  
for rated power 
Takeoff (5 mins) 
Maximum interturbine temp (ITT), 
Maximum air inlet temp(AIT) for 
rated power  
Alternate takeoff (10 min) 
 
Maximum interturbine temp (ITT) 
 
Maximum air inlet temp (AIT)for 
rated power 
Starting (5 secs) 
Maximum interturbine temp (ITT) 
 
1,526oF 
 
 
- - 
 
1,544oF 
 
 
- - 
 
 
- - 
 
 
- - 
 
1,472oF 
 
1544 oF 
135oF 115oF 127oF 119oF - - 92oF 135oF 147 oF 
1,526oF 1,544oF 1,562oF 1,571oF - - - - 1,472oF 1562 oF 
135oF 124oF 127oF 99oF - - 94oF 135oF 147 oF 
--- --- --- 1,517oF - - --- --- --- 
--- --- --- 91oF - - --- --- --- 
1,832oF - - - - - - - - - - - - - - 
 
MODELS (Continued) PT6A- 
67B 
PT6A- 
67D 
PT6A- 
67AG 
PT6A- 
68 
PT6A- 
66A 
PT6A- 
66D 
PT6A- 
67AF 
PT6A- 
67F 
Limitations 
Maximum Continuous 
Maximum interturbine temp (ITT) 
Maximum air inlet temp (AIT) 
for rated power 
Takeoff (5 mins) 
Maximum interturbine temp (ITT), 
Maximum air inlet temp (AIT) 
for rated power  
Starting (5 secs) 
Maximum interturbine temp (ITT) 
 
1,472oF 
 
 
1436 F 
 
1,472oF 
 
1508oF 
 
1472oF 
 
1544oF 
 
 
- - 
 
 
1598 F 
113oF 115 F 92oF 108oF 122oF 158oF 119 oF 90 F 
1,472oF - - - - 1508oF 1472oF 1562oF 1571 oF 1598 F 
125oF 118 F 79oF 108oF 122oF 158oF 99 oF 90 F 
1,832oF - - - - - - - - - - - - - - 
 
MODELS (Continued) PT6A- 
67P 
PT6E- 
67XP 
PT6E- 
67XP 
PT6E-
66XT 
Limitations 
Maximum Continuous 
Maximum interturbine temp (ITT) 
Maximum air inlet temp (AIT) 
for rated power  
Takeoff (5 mins) 
Maximum interturbine temp (ITT), 
Maximum air inlet temp (AIT) 
for rated power  
Starting (5 secs) 
Maximum interturbine temp (ITT) 
 
 
1,544oF 
 
 
- - 
 
 
1,580oF 
 
 
1,544oF 
122oF - - 88.2oF 149oF 
1,562oF - - 1,580oF 1,562oF 
111oF - - 88.2oF 149oF 
1,832oF - - - - - -

TCDS E26NE PAGE 6 
 
 
NOTE 2. TEMPERATURES (continued) 
 
OIL TEMPERATURE LIMITS (degree Fahrenheit) 
 
 PT6A- 
66A 
PT6A- 
66/ 67 
PT6A-
67A 
PT6A-
67R 
PT6A-
67RM 
PT6A- 
67T 
PT6A- 
64 
PT6A-
67B 
PT6A- 
67D 
Takeoff 32-219 32-230 - - - - - - - - 32-219 32-230 - - 
Transient (1) 32-230 - - - - - - - - - - - - - - - - 
Maximum Continuous 32-219 32-230 - - - - - - - - 32-219 32-230 - - 
Minimum (-40) - - - - - - - - - - - - - - - - 
 
 PT6A- 
67AG 
PT6A- 
68  
PT6A- 
66D 
PT6A- 
66B 
PT6A- 
67AF 
PT6A- 
67F 
PT6A- 
67P 
PT6E- 
67XP 
Takeoff (2) 
Transient (1) 
Maximum Continuous 
Minimum 
32-230 
32-230 
32-230 
(-40) 
50-230 
- - 
50-230 
- - 
32-219 
- - 
32-219 
- - 
32-230 
- - 
32-230 
- - 
- - 
- - 
- - 
- - 
50-230 
- - 
50-230 
- - 
32-230 
- - 
32-230 
- - 
50 -230 
- - 
50 -221 
- - 
 
 PT6A- 
68D 
PT6E-
66XT 
Takeoff  50-221 32-219 
 
 
Transient (1) 32-221 32-230 
Maximum Continuous 50-221 32.219 
Minimum (-40) - - 
  
(1) For the PT6A-64, -66A, –66D and PT6E-66XT, the transient time is limited to 10 minutes 
(2) For the PT6E-67XP and PT6E-66XT when operating the engine without fuel anti-icing additives, the minimum oil 
temperature at ground idle prior to setting take-off power is 59°F. 
 
FUEL TEMPERATURE LIMITS- Fuel temperature limitations are shown in the engine installation manuals. 
 
NOTE 3. PRESSURES 
 
OIL PRESSURE LIMITS (psig) (1) 
 
 PT6A- 
66 
PT6A- 
67 
PT6A-
67A 
PT6A-
67R 
PT6A-
67RM 
PT6A-
67T 
PT6A- 
64/ 66A 
PT6A- 
67B 
PT6A- 
67D 
Takeoff 90-135 - - - - - - - - - - 100-135 90-135 - - 
Maximum Continuous 90-135 - - - - - - - - - - 100-135 90-135 - - 
Transient 40-200 - - - - - - - - - - - - - - - - 
Minimum inflight 60 - - - - - - - - - - - - - - - - 
 
 PT6A-
67AG 
PT6A- 
68 (2) 
PT6A- 
66D 
PT6A- 
66B 
PT6A- 
67AF 
PT6A- 
67F 
PT6A- 
67P 
PT6E- 
67XP 
Takeoff 
Maximum Continuous 
Transient 
Minimum 
90-135 
90-135 
- - 
60 
90-120 
90-120 
40-200 
40 
100-135 
100-135 
- - 
60 
90-135 
90-135 
- - 
- - 
- - 
- - 
--- 
- - 
- - 
- - 
--- 
- - 
- - 
- - 
--- 
- - 
- - 
- - 
40 - 175 
- - 
 
 
 PT6A- 
68D (3) 
PT6E- 
66XT 
Takeoff 
Maximum Continuous 
Transient 
Minimum 
90-125 
90-125 
70-130 
80 
100-135 
100-135 
  40-175 
60 
 
(1) Gas generator speed 27,000 RPM or above and oil temperature (140-160oF) 
(2) For the PT6A-68 during aerobatic flight, the allowable steady state oil pressure range is 40-130 psig. At idle power, the 
 minimum allowable transient oil pressure is 15 psig for a maximum of 5 seconds. 
(3) For expanded oil pressure limits during aerobatic flight see the installation manual. 
 
FUEL PRESSURE LIMITS- Fuel pressure limitations are shown in the engine installation manuals

TCDS E26NE PAGE 7 
 
 
NOTE 4. ACCESSORY DRIVE PROVISIONS 
 
     TORQUE MOMENT TORQUE 
  SPEED RATIO CONTINUOUS OVERHANG STATIC 
DRIVE ROTATION 
(1) 
POWER 
TURBINE 
GAS 
GENERATOR 
(lb-in) (lb-in) (lb-in) 
Tachometer, accessory gearbox ** CCW  0.1121 
0.1401*** 
7 /  
11.5 *** 
10 100 
Starter/generator (pad D) CW  0.2931 170   
204 ****** 
250   
190 ****** 
1600   
1380 ****** 
2nd starter/generator (pad D1)**** CW  0.3207 170 155 1600 
Vacuum pump/accessory drive 
(pad H) 
CCW  0.1019 60   
20 ****** 
25 800 
Aircraft Accessory Drive  (pad C)  CCW  0.2041 
0.2244 **** 
150   
30 ****** 
25 800 
Aircraft Accessory Drive  (pad B) 
***** / ******* 
CW  0.3207 135/  
160 *** 
25 800 
Tachometer, reduction gearbox ** CW 0.1264* 
0.1405 
0.1421 *** 
 
 7 10 100 
Propeller overspeed governor ** CW 0.1264* 
0.1405/    
0.1421 *** 
 50 25 850 
Propeller governor ** CW 0.1264* 
0.1405   
0.1421 *** 
 50 25 850 
 
 (1) Direction of shaft rotation, facing engine pad: 
CCW = Counterclockwise 
CW = Clockwise 
  
Gas generator speed (Ng) 100% = 37,468 RPM 
  
Power turbine speed (Np): 
PT6A-64/66/66A/66D/66B  Np 100% = 33,235 RPM (propeller shaft speed 2,205 RPM) 
PT6A-67/67A/67B/67D/67R/67AG/67T/67AF/ 67P/67RM/PT6E-67XP 
Np 100% = 29,894 RPM (propeller shaft speed ,1700 RPM) 
PT6A-68 / PT6A-68D  Np100% = 29,906 RPM (propeller shaft speed 1,995 RPM) 
PT6A-67F   Np 100% = 29,564 RPM (Propeller shaft speed 1700 RPM) 
PT6E-66XT   Np 100% = 29,843 RPM (propeller shaft speed 2,000 RPM) 
 
*    For the PT6A-64, -66, –66A, 66D & 66B series only 
**   Not applicable to the PT6A-68, PT6E-67XP, PT6A-68D and PT6E-66XT 
*** For the PT6A-67F 
**** For the PT6A-67P and PT6E-67XP 
***** Not applicable for the PT6A-67P and PT6E-67XP 
****** For the PT6A-68D 
******* Not applicable to the PT6A-68D

TCDS E26NE PAGE 8 
 
 
NOTE 5. MODEL DESCRIPTION 
Model Characteristics 
PT6A-67 Basic turboprop model 
 
PT6A-67A A version of the basic -67 model with increased normal and maximum cruise ratings. 
 
PT6A-66 Variant model limited to 850 SHP with 2000 RPM standard and opposite rotation gearboxes. 
 
PT6A-67R Derivative of PT6A-67, 1424 SHP with 1700 RPM standard rotating gearbox and inclined turbine exhaust case. 
 
PT6A-64 Variant model.  Derivative of the PT6A-66 with the PT6A-61 reduction gearbox. Limited to 700 SHP with 2000 RPM 
standard rotation gearbox. 
 
PT6A-67B Variant model. Derivative of the basic -67 model using an upgraded reduction gearbox, flat rated at 1200 SHP. 
 
PT6A-67D Variant model. Derivative of the basic -67 model, similar to the PT6A-67R but with take-off flat rated to 1279 SHP. 
 
PT6A-67AG Variant model. Derivative of the basic -67 model, similar to other PT6A-67R but limited to 1350 SHP for special 
applications. 
 
PT6A-66A Derivative of the PT6A-66 with the PT6A-61 reduction gearbox. Limited to 850 SHP with 2000 RPM, standard rotation   
 gearbox. 
 
PT6A-67T Derivative of the basic -67 model, similar to the PT6A-67R but with the -67D hot end hardware. 
 
PT6A-68 Derivative of the PT6A-67 family with a 2000 RPM, 1250 SHP gearbox and an electronic Power Management System 
with mechanical back-up. The engine also features a lubricating system capable of aerobatic maneuvers. 
 
PT6A-67AF Derivative of the basic A67 model using the A67R 1424 SHP take off rating for special applications. 
 
PT6A-66B Derivative of the PT6A-66 with the PT6A-67A thermal rating.  Limited to 950 SHP with 2000 RPM standard & opposite 
rotation gearboxes. 
 
PT6A-66D Derivative of the PT6A-66A, with the PT6A-67A thermal rating. Limited to 850 SHP with 2000 RPM, standard rotation 
gearbox. 
 
PT6A-67F Derivative of the PT6A-67B with a new Reduction Gearbox Rated to 1700 SHP and a new Accessory  
 Gearbox. 
 
PT6A-67P Derivative of the PT6A-67B with the -67A thermal rating.  The AGB has a mounting provision for a second generator unit.  
 
PT6A-67RM Derivative of the PT6A-67R, 1424 SHP with 1700 RPM standard rotating gearbox and inclined turbine exhaust case. 
 
PT6E-67XP Derivative of the PT6A-67P includes an Engine and Propeller Electronic Control System (EPECS) and associated 
hardware.  
 
PT6A-68D Derivative of the PT6A-68 with a 2000 RPM, 1600 SHP gearbox and an electronic Power Management System with  
 mechanical back-up. 
 
PT6E-66XT Derivative of the PT6E-67XP with a 2000 RPM, 895 SHP gearbox, includes an Engine and Propeller Electronic Control 
 System (EPECS) and associated hardware. 
 
NOTE 6. TYPICAL AIRCRAFT ACCESSORIES, COMPONENTS, OR SYSTEM ASSEMBLIES, WITH AIRCRAFT 
LEVEL REQUIREMENTS, PROVIDED AS PART OF ENGINE TYPE DESIGN: 
 
Not Applicable 
 
NOTE 7. AIRCRAFTACCESSORIES, COMPONENTS, OR SYSTEM ASSEMBLIES INSTALLED ON THE ENGINE 
BUT ARE NOT PROVIDED AS PART OF ENGINE TYPE DESIGN: 
 
Not Applicable

TCDS E26NE PAGE 9 
 
NOTE 8. SPECIAL ANTI-ICING OR DE-ICING REQUIREMENTS: 
 
These engines meet the requirements of 14 CFR 33.68 for operation in icing conditions as defined in 14 CFR Part 25 
Appendix C when the intake system conforms to the Pratt & Whitney Canada Installation Manual instructions for 
inertial separation of snow and icing particles. The engines also meet the requirements of 14 CFR 33.27 and do not 
require external armoring. 
 
NOTE 9. ENGINE MOUNT SYSTEM PROVISIONS: 
 
Refer to Installation Manuals for the engine mount system. 
 
NOTE 10. POWER BOOST, INJECTION OR AUGMENTATION SYSTEMS: 
 
Not Applicable 
 
NOTE 11. SPECIAL INSTALLATION REQUIREMENTS: 
 
The PT6A-67R/-67RM models include provisions for automatic power increases from Alternate Takeoff Power to 
Takeoff Power. 
 
Oil tank usable volume: 
1.5 U.S. gallons / 5.68 litres / 1.25 imperial gallons. 
 
For PT6A-68 and PT6A-68D 
0.79 U.S. gallons / 3.00 litres / 0.66 imperial gallons, normal operation, 
0.26 U.S. gallons / 1.00 litre / 0.22 imperial gallons, aerobatic maneuvers. 
 
Oil tank total capacity: 
2.5 U.S. gallons / 9.46 litres / 2.08 imperial gallons.  
4.23 U.S. gallons / 16.00 litres / 3.52 imperial gallons for PT6A-68 and PT6A-68D 
 
The software contained in the PT6A-68 Power Management Unit has been designed and developed in accordance with the 
provisions of RTCA/DO-178A Level 1. 
 
The software contained in the PT6A-68D Power Management Unit has been designed and developed in accordance with the 
provisions of RTCA/DO-178B Level A.  
 
For the PT6E-67XP and PT6E-66XT, the software contained in the Engine and Propeller Electronic Control System (EPECS) 
has been designed, developed, tested and documented in accordance with the provisions of the Critical Category of Level A of 
RTCA/DO178C.  
 
For the PT6A-68 and PT6A-68D, the Power Management Units have not been fire tested and therefore, may only be mounted 
in a designated fire zone if there are instructions to select manual mode operation in the event of a fire indication in that zone. 
 
For the PT6E-67XP and PT6E-66XT, the electronic engine control unit (EEC) has not been fire tested and therefore must not 
be installed in a designated fire zone. 
 
The PT6E-67XP and PT6E-66XT are approved for single engine installations only. Refer to the Installation manual for safety 
analysis assumptions.  
 
For the PT6A-68, PT6A-68D, PT6E-67XP and PT6E-66XT refer to the Installation manual for HIRF and Lightning 
qualification and conformance. 
 
Time Limited Dispatch 
The model PT6E-67XP engine is equipped with a FADEC which is approved for Time Limited Dispatch (TLD).  The 
dispatch criteria are defined in the Airworthiness Limitations Section of the Maintenance Manual P/N 3076392 and 
references report number ER 11080 that lists the TLD dispatchable fault categories. 
 
The model PT6E-66XT engine is equipped with a FADEC which is approved for Time Limited Dispatch (TLD).  The 
dispatch criteria are defined in the Airworthiness Limitations Section of the Maintenance Manual P/N 3134822 and 
references report number ER 11190 that lists the TLD dispatchable fault categories.

TCDS E26NE PAGE 10 
 
NOTE 12. MANUFACTURER’S SERVICE BULLETINS OR OTHER INSTRUCTIONS COVERING MATTERS OF 
INTEREST: 
 
Service Bulletins, vendor manuals overhaul and maintenance manuals, which contain a statement that the document is 
Transport Canada approved, are accepted by the FAA and are considered FAA approved. These approvals pertain to the 
type design only. 
 
 
NOTE 13. SPECIAL OPERATING PROCEDURES: 
 
The PT6A-67AF is a special purpose version of the PT6A-67 series of engines intended for use in military and fire 
fighting aviation. This model may not be re-designated for other than military or firefighting operations. 
 
PT6A-67AG is a special purpose version of the PT6A-67 series of engines intended for use in agricultural aviation. This 
model may not be re-designated for other than agricultural operations.  
 
 
NOTE 14. SPECIAL REPAIR OR OVERHAUL LIMITATIONS: 
 
The recommended engine operating time between overhauls is published in Pratt & Whitney Canada Service 
Bulletin Number  14003 (-67R/67D)  
 14503 (-67AG only)  
 14603 (-64/-66/-67/-67A/-67B/-67E/-66A/-67T/- 66D/- 66B/ -67P/-67RM) 
 14303 (-67AF and -67F)  
For the PT6E-67XP, refer to the maintenance manual 3076392. 
 18203 (-68D) 
For the PT6E-66XT, refer to the maintenance manual 3134822 
 
The PT6A-66/66B engines may be overhauled or maintained as three modules. The gas generator module and the 
power section module are separated at the "C" flange. The nose section module (2nd-stage reduction gearbox) is 
separated at the "A" flange:  
 
Module PT6A-66 PT6A-66B 
Gas generator module 
Power section module 
Nose section module, standard rotation 
Nose section module, reverse rotation 
P/N 3036400 
P/N 3036900 
P/N 3107180 
P/N 3108280 
3072313 
3072314 
3112380 
3112480 
 
The PT6A-67/67A/67B/67D/67R/64/67AG/67T/68/68D/66A/66D/67AF/67F/67P/67RM and PT6E-66XT/67XP, engines may 
be overhauled or maintained as two modules, the gas generator module and the power section module. The separation point is 
the "C" flange: 
 
Gas generator module PT6A-67/67A/67R/64/67AG/66A/67T/67AF P/N 3036400  
Gas generator module PT6A-67B P/N 3042300 
Gas generator module PT6A-67D P/N 3044900 
Gas generator module PT6A-68 P/N 3047000 
Gas generator module PT6A-66D P/N 3071015 
Gas Generator module PT6A-67F P/N 3071197 
Gas Generator module PT6A-67P P/N 3072959 
Gas Generator module PT6A-67RM P/N 3075614 
Gas Generator Module PT6E-67XP P/N 3126994 
Gas Generator Module PT6A-68D P/N 3075885 
Gas Generator Module PT6E-66XT P/N 3136500 
 
Power section module PT6A-67/67A P/N 3036600 
Power section module PT6A-67R/67AG/67T/67AF P/N 3039300 
Power section module PT6A-67B P/N 3042500 
Power section module PT6A-67D P/N 3044700 
Power section module PT6A-64/66A P/N 3045300 
Power section module PT6A-68 P/N 3047200 
Power section module PT6A-66D P/N 3071018 
Power section module PT6A-67F P/N 3071193 
Power section module PT6A-67P P/N 3075956 
Power section module PT6A-67RM P/N 3075610 
Power Section Module PT6E-67XP P/N 3126989 
Power Section Module PT6A-68D P/N 3075882 
Gas Generator Module PT6E-66XT P/N 3136200

TCDS E26NE PAGE 11 
 
 
NOTE 15. APPLICABLE INSTALLATION, MAINTENANCE & OVERHAUL MANUALS: 
 
 Applicable Installation manual / Engine Operating Manual / Interface Control Document (Pratt & Whitney Canada part 
numbers) are: 
 
Engine 
Model 
Engine 
Operating 
Instructions 
Engine 
Installation 
Manual 
Interface Control 
Document 
PT6A-66 3034638 3121073 --- 
PT6A-66A 3045336 3121073 --- 
PT6A-68 3040871 ER 2654 --- 
PT6A-67 3034928 3121073 --- 
PT6A-67A 3037028 3121073 --- 
PT6A-67R 3034929 3121073 --- 
PT6A-67AF 3037035 3121073 --- 
PT6A-64 3037339 3121073 --- 
PT6A-67B 3038535 3121073 --- 
PT6A-67D 3036131 3121073 --- 
PT6A-67AG 3041181 3121073 --- 
PT6A-67T 3053378 3121073 --- 
PT6A-66D 3071159 3121073 --- 
PT6A-66B 3072150 3121073 --- 
PT6A-67F 3071158 3078709 --- 
PT6A-67P 3073490 3121073 --- 
PT6A-67RM 3075731 3121073 --- 
PT6E-67XP see installation manual 3133776 ER 8467 
PT6A-68D see installation manual 3078905 ER 7296 
PT6E-66XT see installation manual 3135258 ER 8481 
 
Applicable Maintenance Manuals and Overhaul manuals (Pratt & Whitney Canada part numbers) are:  
 
Engine 
Model 
Engine 
Maintenance 
Manual 
Line 
Maintenance 
Manual 
Engine 
Overhaul 
Manual 
PT6A-66 3036122 --- 3036123 
PT6A-66A 3036122 --- 3036123 
PT6A-68 3040872 --- 3040873 
PT6A-67 3036132 --- 3036133 
PT6A-67A 3036132 --- 3036133 
PT6A-67R 3036132 --- 3036133 
PT6A-67AF 3036132 --- 3036133 
PT6A-64 3038121 --- 3038322 
PT6A-67B 3038336 --- 3038337 
PT6A-67D 3038336 --- 3038337 
PT6A-67AG 3036132 --- 3036133 
PT6A-67T 3036132 --- 3036133 
PT6A-66D 3070902 --- 3070903 
PT6A-66B 3036122 --- 3036123 
PT6A-67F 3071152 --- 3071153 
PT6A-67P 3038336 --- 3038337 
PT6A-67RM 3073492 --- 3073493 
PT6E-67XP 3076392 3076102 3076393 
PT6A-68D 3077192 --- 3077193 
PT6E-66XT 3134822 3136179 3134823

TCDS E26NE PAGE 12 
 
 
NOTE 16. IMPORT REQUIREMENTS: 
 
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. 
 
NOTE 17. LIFE LIMITED PART INFORMATION: 
 
Life limits for critical rotating components are published in Pratt & Whitney Canada Service Bulletin Numbers 
14002,  
14502 (-67AG and -67F),  
18002 (-68 only),  
14302 (-67AF only), 
For the PT6E-67XP, refer to Maintenance Manual 3076392  
18202 (-68D) 
For the PT6E-66XT, refer to Maintenance Manual 3134822 
  
 
NOTE 18. MILITARY MODEL INFORMATION: 
 
See Note 13 for the PT6A-67AF. 
 
 
NOTE 19. ROTOR SPEEDS 
   MAXIMUM PERMISSIBLE ENGINE OPERATING SPEEDS (RPM) 
 
MODELS PT6A- 
66 
PT6A-
67 
PT6A- 
67A 
PT6A- 
67R 
PT6A- 
67RM 
PT6A- 
67T 
PT6A- 
64 
PT6A- 
67B 
PT6A- 
67D 
PT6A- 
66B 
Gas generator rotor 
speed 
Takeoff  
Alternate takeoff 
Maximum continuous 
Transient 
 
 
Power turbine rotor  
speed 
Takeoff 
Alternate takeoff 
Maximum continuous  
Transient 
 
 
39,000 
--- 
39,000 
39,000 
 
 
 
 
30,145 
--- 
30,145 
33,235 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
29,894 
--- 
29,894 
32,883 
 
 
- - 
--- 
- - 
39,530 ** 
 
 
 
 
- - 
--- 
- - 
- - 
 
 
- - 
39,000 
- - 
39,000 
 
 
 
 
- - 
29,894 
- - 
- - 
 
 
- - 
- - 
- - 
- - 
 
 
 
 
- - 
- - 
- - 
- - 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
- - 
--- 
29,894 
- - 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
30,145 
--- 
30,145 
33,235 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
29,894 
--- 
29,894 
32,883 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
- - 
--- 
32,894 
- - 
 
 
- - 
--- 
- - 
39,530 ** 
 
 
 
 
30,145 
--- 
30,145 
33,235 
 
MODELS PT6A- 
67AG 
PT6A- 
68 
PT6A- 
66A 
PT6A- 
66D 
PT6A- 
67AF 
PT6A- 
67F 
PT6A- 
67P 
PT6E-
67XP 
PT6A- 
68D 
PT6E-
66XT 
Gas generator rotor 
speed 
Takeoff  
Alternate takeoff 
Maximum continuous 
Transient 
 
 
Power turbine rotor  
speed 
Takeoff 
Alternate takeoff 
Maximum continuous  
Transient 
 
 
39,000 
--- 
39,000 
39,000 
 
 
 
 
29,894 
--- 
29,894 
32,883 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
29,981 
--- 
29,981 
32,979 
 
 
- - 
--- 
- - 
- - 
 
 
 
 
30,145 
--- 
30,145 
33,235 
 
 
- - 
--- 
- - 
39,530 ** 
 
 
 
 
- - 
--- 
- - 
- - 
 
 
- - 
--- 
- - 
39,000 
 
 
 
 
29,894 
--- 
29,894 
32,883 
 
 
- - 
--- 
- - 
39,530 * 
 
 
 
 
29,564 
--- 
29,564 
32,520 
 
 
- - 
--- 
- - 
- -** 
 
 
 
 
29,894 
--- 
29,894 
32,883 
 
 
- - 
--- 
- - 
39,079 * 
 
 
 
 
- - 
--- 
- - 
- - 
 
 
- - 
--- 
- - 
39,000 
 
 
 
 
29,981 
--- 
29,981 
32,979 
 
 
- - 
--- 
- - 
39,079 * 
 
 
 
 
29,843 
--- 
29,843 
32,828 * 
 
* Transient: 20 seconds 
** Transient: 20 seconds and limited to 25 excursions between 39000 and 39530 RPM

TCDS E26NE PAGE 13 
 
 
NOTE 20. OUTPUT/PROPELLER SHAFT TORQUE LIMITS: 
 
    MAXIMUM PERMISSIBLE OUTPUT TORQUE, FOOT-POUNDS 
MODELS PT6A- 
66 
PT6A- 
67 
PT6A- 
67A 
PT6A- 
67R 
PT6A- 
67RM 
PT6A- 
67T 
PT6A- 
64 
PT6A- 
67B 
PT6A- 
67D 
Takeoff 
Alternate takeoff 
Maximum Continuous 
Transient (20 seconds) 
3,708 
--- 
3,708 
5,100 
3,708 
--- 
3,708 
5,100 
- - 
--- 
- - 
- - 
4,400 
3,960 
3,825 
- - 
- - 
- - 
- - 
- - 
- - 
- - 
- - 
- - 
2,230 
--- 
2,230 
2,750 
3,708 
--- 
3,708 
5,100 
3,950 
--- 
3,750 
- - 
 
MODELS (continued) PT6A-
66B 
PT6A- 
67AG 
PT6A-
68 
PT6A- 
66A 
PT6A- 
66D 
PT6A- 
67AF 
PT6A- 
67F 
PT6A- 
67P 
PT6E-
67XP 
Takeoff 2,495 4,170 3,283 2,230 - - 4,400 5,252 3,708 3,750 
Maximum continuous 2,495 4,170 3,283 2,230 - - 4,400 5,252 3,708 3,750 
Transient (20 seconds) 2,750 5,100 3,800 2,750 3,750 5,100 6,092 5,100 5,100 
 
MODELS (continued) PT6A-
68D 
PT6E-
66XT 
Takeoff 4,202 2,520 
 
 
Maximum continuous 4,202 2,520 
Transient (20 seconds) 4,874 2,869 
 
 
 
NOTE 21. MAXIMUM PERMISSIBLE COMPRESSOR AIR BLEEDS: 
 
MODELS PT6A- 
66 
PT6A
- 67 
PT6A- 
67A 
PT6A- 
67R 
PT6A- 
67RM 
PT6A- 
67T 
PT6A- 
64 
PT6A- 
67B 
PT6A- 
67D 
Maximum external (%) 
 
5.25 
(7.5***) 
- - - - - - - - - - - - 
(7.5**) 
- - 
(8.0*) 
- - 
Maximum during start 
(lb/min) 
 
1.5 - - - - - - - - - - - - - - - - 
 
MODELS (continued) PT6A-
66B 
PT6A- 
67AG 
PT6A- 
68 
PT6A- 
66A 
PT6A- 
66D 
PT6A- 
67AF 
PT6A- 
67F 
PT6A- 
67P 
PT6E- 
67XP 
Maximum external (%) 
 
5.25 
(7.5***) 
- - - - - - 
(7.5**) 
- - - - - - - - 
(8.0*) 
- - 
(8.0*) 
Maximum during start 
(lb/min) 
 
1.5 - - - - - - 5 - - - - - - - - 
 
MODELS (continued) PT6A-
68D 
PT6E-
66XT 
Maximum external (%) 
 
5.25 - -
(7.5**) 
Maximum during start 
(lb/min) 
 
1.5 - - 
 
 
  *Total of 8% permitted during flight idle conditions. 
  **Total of 7.5% permitted at all conditions above 62% Ng. 
  ***Total of 7.5 % permitted where bleed air used for anti-icing purposes. 
 
NOTE 22. ROTOR DISK INTEGRITY AND ROTOR BLADE CONTAINMENT: (where special requirements apply) 
 
 Not applicable 
 
 
----END----
```

## ADs (6, in force first)

- [AD 2024-04-51](https://openairdocs.org/ad/2024-04-51): Turbine Section · Pratt & Whitney Canada PT6A-64, PT6A-66, PT6A-66A and 17 more. Effective Mar 28, 2024
- [AD 2023-03-02](https://openairdocs.org/ad/2023-03-02): Turbine Engine Compressor Section · Pratt & Whitney Canada PT6E-67XP. Effective Mar 21, 2023
- [AD 2016-05-13](https://openairdocs.org/ad/2016-05-13): Corrosion and perforation of the two-ply Cu-Be bellows in Woodward FCUs. · Pratt & Whitney Canada PT6A-60AG, PT6A-65AG, PT6A-67AF and 1 more. Effective Apr 22, 2016
- [AD 2012-09-10](https://openairdocs.org/ad/2012-09-10): First stage sun gears · Pratt & Whitney Canada PT6A-110, PT6A-112, PT6A-114 and 12 more. Effective May 23, 2012
- [AD 97-04-12](https://openairdocs.org/ad/97-04-12): Compressor Bleed-off Valve · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 52 more. Effective Mar 14, 1997
- [AD 95-13-08](https://openairdocs.org/ad/95-13-08): Compressor Turbine Disk · Pratt & Whitney Canada PT6A-67D. Effective Jul 12, 1995

## Registered aircraft by registry model (OpenAirDocs)

- [Pratt & Whitney Canada PT6A-67P](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67p): 509 aircraft (registry code 52292)
- [Pratt & Whitney Canada PT6A66D](https://openairdocs.org/engine/pratt-whitney-canada-pt6a66d): 323 aircraft (registry code 52069)
- [Pratt & Whitney Canada PT6E-67XP](https://openairdocs.org/engine/pratt-whitney-canada-pt6e-67xp): 294 aircraft (registry code 52311)
- [Pratt & Whitney Canada PT6A-67B](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67b): 277 aircraft (registry code 52158)
- [Pratt & Whitney PT6A66D](https://openairdocs.org/engine/pratt-whitney-pt6a66d): 176 aircraft (registry code 52281)
- [P & WC PT6E-66XT](https://openairdocs.org/engine/p-wc-pt6e-66xt): 164 aircraft (registry code 51761)
- [Pratt & Whitney Canada PT6A-66 series](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-66-series): 160 aircraft (registry code 52118)
- [Pratt & Whitney Canada PT6A-67AG](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67ag): 159 aircraft (registry code 52211)
- [Pratt & Whitney Canada PT6A-67A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67a): 150 aircraft (registry code 52207)
- [Pratt & Whitney Canada PT6A-64](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-64): 95 aircraft (registry code 52070)
- [Pratt & Whitney Canada PT6A-67F](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67f): 91 aircraft (registry code 52290)
- [Pratt & Whitney Canada PT6A-66B](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-66b): 48 aircraft (registry code 52287)
- [Pratt & Whitney Canada PT6A-67](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67): 48 aircraft (registry code 52159)
- [Pratt & Whitney Canada PT6A-66](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-66): 29 aircraft (registry code 52206)
- [Pratt & Whitney Canada PT6A-67D](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67d): 10 aircraft (registry code 52210)
- [Pratt & Whitney Canada PT6A-67R](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67r): 10 aircraft (registry code 52208)
- [Pratt & Whitney Canada PT6A-68](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-68): 2 aircraft (registry code 52212)
- [Pratt & Whitney Canada PT6A-66A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-66a): 1 aircraft (registry code 52213)
- [Pratt & Whitney Canada PT6A-67T](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67t): 0 aircraft (registry code 52209)

## STCs approved under this data sheet (4)

- [STC SE8652SW](https://openairdocs.org/stc/SE8652SW): Installation of a flexible hose from the Propeller Primary Governor to the Fuel Control Unit.. Air Tractor Inc
- [STC SE00022EN](https://openairdocs.org/stc/SE00022EN): Installation of Oil Tank Filler Neck Check Valve.. Helicopter Support Inc Services Div
- [STC SE659NE](https://openairdocs.org/stc/SE659NE): Installation of oil tank filler neck check valve, P/N TSA-76A.. Aviation Components Support
- [STC SE8827SW](https://openairdocs.org/stc/SE8827SW): Modification to exhaust duct P/N 3109946-01.. Air Tractor, Inc

---
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.