- Holder
- Weatherly Aircraft Company
- Revision
- 8
- Revised
- November 5, 2014
- Status
- Current
- Product
- Aircraft · Small Airplane
- Certification basis
- Part 21, Part 23, Part 36, Part 91, Part 137
- Models
- 5
- Registered
- 32 aircraft
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 5
| Model | Also known as | Note |
|---|---|---|
| 620B-TG | Formerly Weatherly Aviation Company, then Inc. | |
| 620 | Formerly Weatherly Aviation Company, then Inc. | |
| 620A | Formerly Weatherly Aviation Company, then Inc. | |
| 620TP | Formerly Weatherly Aviation Company, then Inc. | |
| 620B | Formerly Weatherly Aviation Company, then Inc. |
Airworthiness directives · 3
ADs whose products are models on this data sheet, matched by model and maker.
Registered aircraft
Registry models that point at this data sheet, with their registered aircraft.
STCs approved under this data sheet · 38
STC SA04652CHTo allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specificationSTC SA7965SWApplication of fabric and polyurethane finishing system.STC SA01757WITo allow the use of UL91 or UL94 (minimum) grade aviation fuel
See all 38 STCsWhat the data sheet says
From the PDF’s text layer, line by line: tables lose their columns. The PDF is the record.
Page No. 1 2 3 4 5 6 7 8 9
Rev. No. 8 6 6 6 6 6 6 6 6
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
A26WE
Revision 8
Weatherly
620
620TP
620A
620B
620B-TG
November 5, 2014
TYPE CERTIFICATE DATA SHEET A26WE
Type Certificate Holder: Weatherly Aircraft Company
2034 W/ Potomac Avenue
Chicago, Illinois 60622-3152
Type Certificate Ownership Record GBECK, Inc. (D.B.A.) Weatherly Aviation Company, Inc., 2100 Flightline Drive.
Lincoln, California 95648 transferred ownership of TC A26WE to Weatherly Aircraft
Company on November 6, 2000
I - Model 620 (Restricted Category) Approved October 24, 1979
(See ALL MODEL Section) (See NOTES Section)
Engine Pratt & Whitney R985-AN-1, AN-3, or AN-14B
Fuel 80/87 Minimum Grade Aviation Gasoline. Alternate fuel is 100LL.
Engine Limits Engine Model AN-1 & AN-3 HP RPM In. Hg. Press Alt.
Takeoff (1 min.) at SL 450 2300 37.5 SL
Maximum Continuous at SL 350 2100 33.0 SL
Maximum Continuous 350 2100 32.0 3000 ft.
(Rated Pressure Alt.) 350 2100 31.0 6000 ft.
Straight line variation of manifold pressure between points listed.
Engine Model AN-14B HP RPM In. Hg. Press Alt.
Takeoff (1 min.) at SL 450 2300 36.5 SL
Maximum Continuous at SL 350 2100 31.5 SL
Maximum Continuous 350 2100 30.5 3000 ft.
(Rated Pressure Alt.) 350 2100 29.5 6000 ft.
350 2100 29.0 7800 ft.
Straight line variation of manifold pressure between points listed.
Propeller & Propeller Limits Hartzell HC-B3R30-4 or -4B Hub with R10152-5½ R Blades
Diameter: Not over 95½ ins.; Not under 95½ ins.
Pitch settings at 30" station:
(Constant Speed) - 16° Low, 28° High
Static RPM at maximum throttle setting not over 2300 RPM; not under 2200 RPM.
Airspeed Limits Without Spreader or Tip Vanes
VNE - Never Exceed 176 mph (153 knots) IAS or CAS
VNO - Normal Operating 140 mph (122 knots) IAS or CAS
VA - Maneuvering 129 mph (112 knots) IAS or CAS
With P/N 50453 Spreader Installed
VNE - Never Exceed 155 mph (135 knots) IAS or CAS
A26WE 2
With P/N 50520 Tip Vanes Installed
VNE - Never Exceed 166 mph (144 knots) IAS or CAS
Airspeed limits are unchanged with Cowl Speed Ring installed P/N 50784 per
Drawing 50783
Maximum Operating
Altitude 15,500 ft.
C.G. Range Inches aft of datum (+22.1) to (+26.0) at all weights
Empty Weight C.G. Range None
Maximum Weight 4000 lbs.
No. of Seats 1 (+68.0)
Hopper Capacity 2000 lbs. (+15.0)
Baggage Shelf 25 lbs. (+91.25)
Fuel Capacity 72.5 gal. total
Right Wing Tank 27½ gal. with unusable 2½ gal. (+36.0)
Left Wing Tank (combined with center tank) 45 gal. with unusable 5 gal. (+36.0)
Oil Capacity 6.7 gal. plus 1 gal. in system (-22.2)
Control Surface Rudder Left 20° ± 1° Right 20° ± 1°
Elevator Up 27° ± 1° Down 15° ± 1°
Aileron Up 26° ± 1½° Down 13½° ± 1½°
Serial Nos. Eligible 1501 and subsequent
II - Model 620TP (Restricted Category) Approved October 17, 1980
(See ALL MODEL Section) (See NOTES Section)
Engine Pratt & Whitney PT6A-11AG
Fuel Jet A and Jet B fuel. Refer to P&WC Service Bulletin No. 12144. With certain
limitations, automotive diesel fuels are approved for use.
Engine Limits Engine HP NP RPM NG RPM
Takeoff (5 min. SL) 500 2200 (100%) 38,100 (101.5%)
Maximum Cont., SL 350 2000 (91%) 38,100
Maximum Reverse 475 2112 (96%) 38,100
Maximum torque (steady) = 1194 lb. ft. (38.6 psig)
(5 min. SL)
Maximum torque (accel.) = 1800 lb. ft. (58.3 psig)
(5 sec.)
Maximum Permissible Temperature Inter-Turb. Temp.
Takeoff 1292°F (700°C)
Maximum Continuous 1292°F (700°C)
Starting Transient 1994°F (1090°C)
Oil Temperature
Normal range 50°F to 210°F (10°C to 99°C)
Maximum 210°F (99°C)
3 A26WE
Oil Pressure
Normal range (27,000 RPM NG or above) 80-100 psig
Minimum 40 psig
Maximum 100 psig
Fuel Pressure
Engine inlet pressure is measured at the inlet to
the engine high pressure gear pump. (This point is also the outlet of the Weatherly
installed low pressure pump mounted on the engine).
Minimum 15 psig
Maximum 35 psig
Propeller & Propeller Limits Hartzell reversing propeller with Woodward overspeed governor
Model HC-B3T
Hub No. HC-B3TN-3
Blade No. T10282-6
Diameter Maximum 96 inches
Minimum 92 inches
Pitch settings at 30 inch radius
Low pitch 16° ± 0.5°
Propeller spinner, Hartzell P/N 3434-6
Overspeed governor, Woodward P/N A210507
Airspeed Limits Without Spreader or Tip Vanes
VNE - Never Exceed 176 mph (153 knots) IAS or CAS
VNO - Normal Operating 140 mph (122 knots) IAS or CAS
VA - Maneuvering 129 mph (112 knots) IAS or CAS
With P/N 50453 Spreader Installed
VNE - Never Exceed 155 mph (135 knots) IAS or CAS
With P/N 50520 Tip Vanes Installed
VNE - Never Exceed 166 mph (144 knots) IAS or CAS
C.G. Range Inches 3500 lbs. gross weight (+24.8) to (+22.1) with
straight line variation to 4000 lbs. gross weight
(+23.6) to (+22.1)
Empty Weight C.G. Range None
Maximum Weight 4000 lbs.
No. of Seats 1 (+68.0)
Hopper Capacity 2000 lbs. (+15.0)
Baggage Shelf 15 lbs. (+91.25)
Fuel Capacity 96 gal. total
Right Main Tank with Right Outer Wing Tank, 42 gal., unusable 6 gal. (+36.0)
Left Main Tank (combined with center tank) with Left Outer Wing Tank, 54 gal.,
unusable 6 gal. (+36.0)
Oil Capacity 2.3 gal. plus .75 gal. in system (-24.0)
Maximum Operating Altitude 15,000 ft.
A26WE 4
Control Surface Rudder Left 20° ± 1° Right 20° ± 1°
Elevator Up 27° ± 1° Down 15° ± 1°
Aileron Up 26° ± 1½° Down 13½° ± 1½°
Serial Nos. Eligible 1502 and subsequent, Model 620TP airplanes have the letters TP following the
numerical serial number.
III - Model 620A (Restricted Category) Approved March 25, 1987
(See ALL MODEL Section) (See NOTES Section)
Engine Pratt & Whitney R985-AN-1, AN-3, or AN-14B
Fuel 80/87 Minimum Grade Aviation Gasoline. Alternate fuel is 100LL.
Engine Limits Engine Model AN-1 & AN-3 HP RPM In. Hg. Press Alt.
Takeoff (1 min.) at SL 450 2300 37.5 SL
Maximum Continuous at SL 350 2100 33.0 SL
Maximum Continuous 350 2100 32.0 3000 ft.
(Rated Pressure Alt.) 350 2100 31.0 6000 ft.
Straight line variation of manifold pressure between points listed.
Engine Model AN-14B HP RPM In. Hg. Press Alt.
Takeoff (1 min.) at SL 450 2300 36.5 SL
Maximum Continuous at SL 350 2100 31.5 SL
Maximum Continuous 350 2100 30.5 3000 ft.
(Rated Pressure Alt.) 350 2100 29.5 6000 ft.
350 2100 29.0 7800 ft.
Straight line variation of manifold pressure between points listed.
Propeller & Propeller Limits Hartzell HC-B3R30-4B Hub with R10152-5½ Blades
Diameter: Not over 95½ ins.; Not under 95½ ins.
Pitch settings at 30" station:
(Constant Speed) - 16° Low, 28° High
Static RPM at maximum throttle setting not over 2300 RPM; not under 2200 RPM.
Airspeed Limits Without Spreader
VNE - Never Exceed 176 mph (153 knots) IAS or CAS
VNO - Normal Operating 140 mph (122 knots) IAS or CAS
VA - Maneuvering 129 mph (112 knots) IAS or CAS
With P/N 50453 Spreader Installed
VNE - Never Exceed 155 mph (135 knots) IAS or CAS
Airspeed limits are unchanged with Cowl Speed Ring installed P/N 50784 per
Drawing 50783
Maximum Operating
Altitude 15,500 ft.
C.G. Range Inches aft of datum (+22.1) to (+26.75) at all weights
Empty Weight C.G. Range None
Maximum Weight 4000 lbs.
No. of Seats 1 (+68.0)
Hopper Capacity 2000 lbs. (+15.0)
5 A26WE
Baggage Shelf 25 lbs. (+91.25)
Fuel Capacity 72.5 gal. total
Right Wing Tank 27½ gal. with unusable 2½ gal. (+36.0)
Left Wing Tank (combined with center tank) 45 gal. with unusable 5 gal. (+36.0)
Oil Capacity 6.7 gal. plus 1 gal. in system (-22.2)
Control Surface Rudder Left 20° ± 1° Right 20° ± 1°
Elevator Up 27° ± 1° Down 15° ± 1°
Aileron Up 29° ± 1½° Down 11½° ± 1°
Serial Nos. Eligible 1520 and subsequent
IV - Model 620B (Restricted Category) Approved July 17, 1992
(See ALL MODEL Section) (See NOTES Section)
Engine Pratt & Whitney R985-AN-1, AN-3, or AN-14B
Fuel 80/87 Minimum Grade Aviation Gasoline. Alternate fuel is 100LL.
Engine Limits Engine Model AN-1 & AN-3 HP RPM In. Hg. Press Alt.
Takeoff (1 min.) at SL 450 2300 37.5 SL
Maximum Continuous at SL 350 2100 33.0 SL
Maximum Continuous 350 2100 32.0 3000 ft.
(Rated Pressure Alt.) 350 2100 31.0 6000 ft.
Straight line variation of manifold pressure between points listed.
Engine Model AN-14B HP RPM In. Hg. Press Alt.
Takeoff (1 min.) at SL 450 2300 36.5 SL
Maximum Continuous at SL 350 2100 31.5 SL
Maximum Continuous 350 2100 30.5 3000 ft.
(Rated Pressure Alt.) 350 2100 29.5 6000 ft.
350 2100 29.0 7800 ft.
Straight line variation of manifold pressure between points listed.
Propeller & Propeller Limits Hartzell HC-B3R30-4B Hub with R10152-5½ R Blades
Diameter: Not over 95½ ins.; Not under 95½ ins.
Pitch settings at 30" station:
(Constant Speed) - 16° Low, 28° High
Static RPM at maximum throttle setting not over 2300 RPM; not under 2200 RPM.
Airspeed Limits Without Spreader
VNE - Never Exceed 176 mph (153 knots) IAS or CAS
VNO - Normal Operating 140 mph (122 knots) IAS or CAS
VA - Maneuvering 129 mph (112 knots) IAS or CAS
With P/N 50453 Spreader Installed
VNE - Never Exceed 155 mph (135 knots) IAS or CAS
Airspeed limits are unchanged with Cowl Speed Ring installed P/N 50784 per
Drawing 50783
Maximum Operating
Altitude 15,000 ft.
C.G. Range Inches aft of datum (+22.1) to (+27.5) at all weights
Empty Weight C.G. Range None
A26WE 6
Maximum Weight 4000 lbs.
No. of Seats 1 (+70.0)
Hopper Capacity 2000 lbs. (+15.0)
Baggage Shelf 25 lbs. (+93.25)
Fuel Capacity 97.5 gal. total
Right Wing Tank 40 gal. with unusable 2½ gal. (+36.0)
Left Wing Tank (combined with center tank) 57.5 gal. with unusable 5 gal. (+36.0)
Oil Capacity 6.7 gal. plus 1 gal. in system (-22.2)
Control Surface Rudder Left 20° ± 1° Right 20° ± 1°
Elevator Up 27° ± 1° Down 15° ± 1°
Aileron Up 29° ± 1½° Down 11½° ± 1°
Serial Nos. Eligible 1550 and subsequent
V- Model 620B-TG (Restricted Category) Approved March 12, 1997
(See ALL MODEL Section) (See NOTES Section)
Engine Allied Signal TPE331-1-151A (See NOTE 7)
Fuel Jet A , Jet A-1, Jet B, Jet P-4, and Jet P-5 fuel. Refer to Allied Signal Service Bulletin
No. EMS 53111, EMS 53112, EMS 53113, and EMS 53116. (See NOTE 8).
Engine Limits Engine HP NP RPM
Takeoff (SL) 500∗ 2000 (100%)
Maximum Cont., SL 500∗ 2000 (100%)
Maximum Reverse 475 1910 (96.5 %)
∗ Maximum steady torque (SL) = 1313 lb. ft (47.0 psig)
Ground Idle 64-66% (speed lever low)
Flight Idle 94.5-96.5% (speed lever high)
Maximum Permissible Temperature Exhaust Gas Temp
Takeoff 1047°F (564°C)
Maximum Continuous 1047°F (564°C)
Starting Transient (1 sec.) 1472°F (800°C)
Oil Temperature
Type I Oil Normal Range 40°F (-40°C) to 200°F (93°C)
Type II Oil Normal Range 40°F (-40°C) to 260°F (127°C)
Oil conforming to Allied Signal EMS 53110 ( Type I and Type II)
Oil Pressure
Normal @ 100% speed (green) 70-120 psig
Normal Caution (amber) 50-70 psig
Minimum @ 65% speed ground idle 50 psig
Maximum 120 psig
Fuel Pressure
Engine fuel pump inlet pressure is 5 psig plus true vapor pressure of fuel. Engine inlet
pressure is measured at the inlet to the engine high pressure gear pump. (This point is
also the outlet of the Weatherly installed low pressure pump mounted on the engine).
See NOTE 9.
7 A26WE
Minimum (red line) 15 psig
Normal (amber arc) 15-20 psig
Normal (green arc) 20- 50 psig
Maximum (red line) 50 psig
Propeller & Propeller Limits McCauley reversing propeller with Woodward overspeed governor
Model 3GFR34C602/100LA-2
Hub No. 3GFR34C602
Blade No. 100LA-2
Diameter: Maximum 98.0 inches
Minimum 96.0 inches
Pitch setting at 30 inch radius
Low pitch 9.5° ± 0.5°
Propeller spinner, McCauley P/N E4858
Overspeed governor, Woodward P/N 895282-14
Propeller Speed
Normal 2000 rpm
Maximum (5 sec.) 2100 rpm
Maximum (5 min.) 2020 rpm
Airspeed Limits VMO - Maximum Operating without Spreader 176 mph (153 knots) IAS
VMO - Maximum Operating with Spreader 155 mph (135 knots) IAS
VNO - Normal Operating 140 mph (122 knots) IAS
VA - Maneuvering 129 mph (112 knots) IAS
Vy - Best Rate Climb 90 mph ( 78 knots) IAS
C.G. Range +19.5 to +26.5 inches aft of datum for all weights.
Empty Weight C.G. Range 3328 lb. at +19.1 in. (with optional Spreader P/N 72097 installed 3272 lb. at +17.4 in.)
Maximum Weight 4300 lb. (+24.73) See NOTE 11.
No. of Seats 1 (+73.0)
Hopper Capacity 2000 lb. (+15.0)
Baggage Shelf 25 lb. (+93.25)
Fuel Capacity 130 gal. total , 14 gal. unusable (+36.0).
The fuel tank system consists of 7 interconnected tanks (2 in the left wing, 2 in the right
wing, and 3 in wing center section) .
Oil Capacity 1.56 gal. total (-54.0)
Maximum Operating Altitude 15,000 ft.
Control Surface Rudder Left 20° ± 1° Right 20° ± 1°
Elevator Up 27° ± 1° Down 15° ± 1°
Aileron Up 29° ± 1½° Down 11½° ± 1½°
Serial Nos. Eligible 1615, 1636, and 3000 and subsequent
Specifications Pertinent to all Models
Datum Wing leading edge outboard of fillet ( 6 inches forward of the main gear axle).
Level Means Leveling lugs on outboard side of right hand fuselage frame near pilot's seat.
A26WE 8
Certification Basis FAR 21.25(a) effective February 1, 1965, with policies contained in CAM 8 Appendix B
Airworthiness Requirements for the Special Purpose of:
Agricultural Operations under FAR 21.25(b)(1).
Note: In accordance with FAR 36.1(a)(2), compliance with the noise requirements
was not shown. Therefore, aircraft certificated under this certificate are only eligible
for agricultural operations excepted by FAR 36.1(a)(2) and defined under FAR 137.3.
620TP Turboprop Installation: FAR 23, Amendments 23-1 to 23-21; Subpart B - Flight,
Subpart E - Powerplant and 23.1305 Powerplant Instruments. (FAR’s 23.221, 23.954,
23.967(a)(6), 23.973(d), 23.1093, 23.1305(q), 23.1305(s), and 23.1305(t) have been
waived under the provisions of FAR 21.25)
620B-TG Turboprop Installation: FAR 23, Amendments 23-1 to 23-46; Subpart B -
Flight, Subpart E - Powerplant. (FAR’s 23.1305(s) and 23.1305(t) have been waived
under the provision of FAR 21.25)
Noise Control Act of 1972
Restricted Type Certificate issued October 24, 1979
Application for Type Certificate dated June 16, 1978
Production Basis Production Certificate No. 416
Export Eligibility Aircraft will be eligible for issuance of an Export Certificate of Airworthiness subject to
compliance with Federal Aviation Regulations Part 21, Subpart L, Sections 21.321
through 21.339. The applicable procedures are contained in Advisory Circular 21.2.
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, the following items of equipment are required:
620: (a) FAA Approved Airplane Flight Manual dated October 24, 1979, and
FAA approved revisi ons
(b) Weatherly Equipment List A-620
620TP: (a) FAA Approved Airplane Flight Manual dated October 15, 1980, and
FAA approved revisions
(b) Weatherly Equipment list A-620TP
620A: (a) FAA Approved Airplane Flight Manual dated March 25, 1987, and
FAA approved revisions
(b) Weatherly Equipment List A-620A
620B: (a) FAA Approved Airplane Flight Manual dated July 16, 1992, and FAA
approved revisions
(b) Weatherly Equipment List A-620B
620B-TG: (a) FAA Approved Airplane Flight Manual dated March 20, 1997, and
FAA approved revisions
(b) Weatherly Equipment List A-620B-TG
NOTE 1. Current weight and balance report including list of equipment included in certificated
empty weight, and loading instructions, when necessary, must be provided for each
aircraft at the time of original certification.
9 A26WE
The certification weight and corresponding center of gravity must include for Models
620, 620A, and 620B undrainable system oil of 2.3 lb. at (-22.2) and unusable fuel of 7.5
gals. at (+36.0).
The certificated empty weight and corresponding center of gravity must include for
Model 620TP undrainable system oil for 5.25 lb. at (-24.0) and unusable fuel of 12 gals.
at (+36.0).
The certificated empty weight and corresponding center of gravity must include for
Model 620B-TG undrainable system oil for 11.7 lb. at (-54.0) and unusable fuel of 14
gals. at (+36.0).
NOTE 2. In addition to the operating limitations in this data sheet, area, economic, passenger and
other appropriate operating limitations in accordance with FAR 21.25 shall be shown on
placard or listing accessible to the pilot.
The following placard must be displayed in front of and in clear view of the pilot:
"This airplane must be operated as a restricted category airplane in compliance with the
operating limitations stated in the form of placards, markings, and manuals."
For additional placards, see Weatherly Model 620, 620A, 620B, 620TP, and 620B -TG
Airplane Flight Manuals.
NOTE 3. 620 and 620A: Alternator 24 volt, Motorola Model AN24N900, Maximum current load
is limited to a total load of 20.8 Amps.
620B : Alternator 24 volt, 50 Amps. Skytronics Model JASCO 7555T and/or 70 Amps
Model JASCO 7655T with Voltage Controller J12M24SP is approved for thi s installation.
620B-TG: Starter Generator Lucas Aerospace Model 23048-023 with Voltage Regulator
General Electric CSV1105-30 is approved for this installation. Maximum current load is
limited to a total load of 250 Amps, 28.5 Volts.
NOTE 4. 620TP and 620B-TG: Flight into known icing conditions is prohibited. Do not fly into
areas of visible moisture when the temperature is below 40°F.
NOTE 5. 620TP and 620B-TG: Approved for reverse thrust during ground operation only.
NOTE 6. All fuel and oil capacities are in US gallons.
NOTE 7. The Allied Signal TPE331-1-151A engine is a derivative of the TPE331 -1 engine
approved for this installation.
NOTE 8. 620B-TG: When operating at ambient temperature of 0°C or below, the fuel must
contain an icing inhibitor, the quantity not to exceed 0.15% by volume in compliance
with MIL-I-27686D or E.
NOTE 9. 620B-TG: A Fuel Pressure \ Flow Instrument (Electronic International Model FP-5) and
a Flow Transducer (EG&G Model FT-8AEXSBLEA-2) may be used as an option to the
standard Fuel Pressure Gage with the following placard installed:
“Do not rely on the electronic fuel flow instrument to determine fuel quantity level in
tanks.”
NOTE 10. Noise Certification: This airplane has not been shown to comply with the noise limits in
FAR Part 36 and must be operated in accordance with the noise operation limitation
required by FAR 91.815.
NOTE 11. The 620B-TG model aircraft has been certificated up to a Maximum Gross Weight of
4300 lbs. Any increase in Gross Weight will require FAA evaluation and approval.
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