Bombardier Learjet 31A

Type (Muster)
Business-jet (Geschäftsreiseflugzeug)

Country (Land)
USA

Manufacturer (Hersteller)
Bombardier Aerospace (Learjet)
One Learjet Way
Wichita, Kansas 67277-7707
USA

Phone: 001-316/946-2000
Fax: 001-316/946-2220

General (Allgemeine Angaben)
Crew (Besatzung): 2
Passengers (Passagiere): 6 to 7 in normal business seating. Up to 10 passengers can be carried.
Baggage capacity (Gepäckraum): 1,13 cu m or 227 kg

Power plant (Antrieb): 2 x Honeywell (AlliedSignal) TFE731-2 turbofans
Thrust (Schub): 2 x 3500 lbs (15,56 kN) at take-off
Fuel consumption (Kraftstoffverbrauch): 632,2 litres (167 US gal)/hour average at cruise speeds

Noise levels:
Takeoff (Start): 81,9 EPNdB
Approach (Anflug): 92,8 EPNdB
Sideline (Vorbeiflug): 86,9 EPNdB

Dimensions (Abmessungen)
Length (Länge): 14,83 m
Height (Höhe): 3,75 m
Span (Spannweite): 13,35 m
Maximum fuselage diameter (Rumpfdurchmesser): 1,62 m
Wing area (Flügelfläche): 24,6 sq m

Cabin length (Kabinenlänge): 5,21 m (without cockpit)
Cabin width (Kabinenbreite): 1,50 m (half height / in halber Höhe)
Cabin height (Kabinenhöhe): 1,32 m
Floor area (Kabinenfläche): 3,60 sq m
Cabin volume (Kabinenvolumen): 7,7 cu m (excluding cockpit)

Weights (Massen)
Basic operating weight (Einsatz-Leermasse): 5053 kg
Max. payload (max. Nutzlast): 1071 kg
Payload with full fuel (Nutzlast mit vollen Tanks): 878 kg
Max. fuel (Max. Kraftstoff): 1871 kg
Fuel with max. payload (Kraftstoff bei max. Nutzlast): 1678 kg
Max. zero-fuel weight (Max. Masse ohne Kraftstoff): 6123 kg
Max. ramp weight (Max. Masse am Boden): 7597 kg or 7801 kg or 8119 kg as an option
Max. take-off weight (Max. Startmasse): 7484 kg or 7710 kg or 8028 kg as an option
Max. landing weight (Max. Landemasse): 7257 kg

Performance (Flugleistungen)
High speed cruise (max. Reisegeschwindigkeit): Mach 0.81 / 858 km/h (463 kts)
Normal speed (Reisegeschwindigkeit): Mach 0.79 / 845 km/h (456 kts)
Long range cruise speed (Reisegeschwindigkeit auf langen Strecken): Mach 0.73 / 420 kts (778 km/h)
Max. operating altitude (Dienstgipfelhöhe): 15545 m (51000 ft)
Time to initial curise altitude (Steigzeit auf anfängliche Reiseflughöhe): 19 min 48 sec
Climb rate (Steigrate): 25,9 m/s at sea level
Balanced field length (Startstrecke): 1064 m (sea level, ISA, max. weight)
Landing distance at max landing weight (Landestrecke): 875 m
Range (Reichweite):
- 1455 NM (2695 km) with NBAA IFR reserves, ISA, with 4 passengers
- 1562 NM (2892 km) with VFR rules

Costs (Kosten)
Typically equipped price is around 6,3 million US-Dollars as of October 1999.
Base prize in 1995 was 4,495 million US-Dollars, and in 12/92, the standard Learjet 31A sold at 4,895 million US-Dollars. At its introduction in October 1990, the Learjet 31 was priced at 4,295 million US-Dollars.

Customers (Kunden)
A totoal of 206 Learjet 31s were built by December 2000. This number includes 36 of the original Learjet 31. In 2000, deliveries numbered 28. There were 24 in 1999, 22 in 1998, 21 in 1997, 13 in 1996, 19 in 1995 and 14 in 1994. Twenty-one were in the Bombardier FlexJets fleet in early 1999.
Customers include Singapore Airlines (pilot training) and the government of Balochistan, a Pakistani state.

Competition (Konkurrenz)
Cessna Citation II
Cessna Citation V
Raytheon Beechjet 400A

Remarks (Bemerkungen)
The Learjet 31A is the entry-level jet in Bombardiers corporate aviaiton family. It is claimed to offer the lowest operating cost of any transport category corporate jet.
Design features of the original Learjet 31 model include the fuselage/cabin and power plant from the Learjet 35A/36A models with the wing of the Learjet 55. Delta fins were added to eliminate Dutch roll tendencies. They are said to stabilize the aircraft at high airspeeds, induce docile stall and reduce approach speeds and field lengths.
The Learjet 31A, which was announced inOctober 1990, offers five major enhancements, including an increase in cruise Mach number, an highly integrated digital avionics package from AlliedSignal (now Honeywell) as standard, reengineered flight deck display and control panels, a steer-by-wire nosewheel steering and an electrically heated windshield..
There also is an optional extended range version (31A/ER) with 2627 litres of fuel, but reduced cabin space.

History (Geschichte)
The Learjet 31 was first announced in September 1987, but an aerodynamic prototype (modified Learjet 35A) had already flown on May 11, 1987. The first production aircraft (N311DF) was then used as a systems testbed. FAA certification to FAR Part 25 standards occurred on August 12, 1988.
At the NBAA convention in New Orleans in October 1990, the Learjet 31A and 31A/ER were announced to replace the Learjet 31. FAA certification was achieved on 25 July 1991. Deliveries began that month, to North American customers. A German type certificate was awarded on November 12, 1991.
By September 1993, 74 Learjet 31As were delivered and had logged more than 45000 flight hours.
In October 1994, Bombardier announced a price reduction of half a million Dollars, to 4,495 million US-Dollars, "to represent best value among light jets and hig-end turboprops". The 100th Learjet 31/31A was used as a demonstrator in 1995. By June 1996, the first aircraft with a new aft-cabin lavatory installation was delivered. Also in 1996, an optional baggage locker installed below the tail was becoming available at 74950 US-Dollars.
In April 1999, Bombardier increased the maximum takeoff weight to 8029 kg, enabling another 317 kg of paylaod.
At the NBBA convention in Atlanta In October 1999, Bombardier announced a number of enhancements for the Learjet 31A, which were included in aircraft coming off the line early in 2000. Among the changes are:

increased maximum landing weight (7260 kg)
digital control for the TFE731-2 engines
thrust reversers as standard
dual air conditioning systems, with one dedicated to cool the cockpit
redesigned wingtips to improve high-speed/high-altitude performance and handling
inspection cycles extended from 1200 to 2400 hours
new winglets for improved high-altitude performance

In June 2000, the Learjet 31A was included into the optioanla Dependability Plus programme, which provides guaranteed maintenance costs and aircraft trade-in value.
On October 3, 2000, the 200th aircraft was handed over to Falcon Air Services of Phoenix, Arizona.

Last updated 13. September 2001

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