TWIN-ENGINE HELICOPTER OPERATIONS
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TWIN-ENGINE HELICOPTER OPERATIONS. WHY A TWIN?. Direct routings in urban areas: saves time Can do Commercial Air Transport at night Can fly IFR (cloud/low visibility) subject to temperature and pilot qualification/training Operates to smaller landing sites than single-engine helicopters

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Why a twin
WHY A TWIN?

  • Direct routings in urban areas: saves time

  • Can do Commercial Air Transport at night

  • Can fly IFR (cloud/low visibility) subject totemperature and pilot qualification/training

  • Operates to smaller landing sites than single-engine helicopters

  • Can be used for over-water CAT flights

AV8 Helicopters Ltd


TWIN ENGINE: ENHANCED OVERALL SAFETY

AND OPERATIONAL FLEXIBILITY

THE AIRCRAFT OF CHOICE

FOR CORPORATE AND EXECUTIVE WORK

AV8 Helicopters Ltd


PROS AND CONS OF COMMON LIGHT TWIN HELICOPTERS

  • Agusta 109: sleek, fast, up to 7 pax seats

  • EC 135: state of art, quiet, high capital cost, not

  • widely available, but lower DOC than some

  • MD 902 Explorer: ‘NOTAR’ high capital costs,

  • history of technical and support difficulties

  • Bell 427: unusually for Bell, has not been a

  • commercial success

  • AS355 Twin Squirrel F1/F2/N: easy availability

  • predictable DOC, good cabin configurations

AV8 Helicopters Ltd


TWIN SQUIRREL

  • AS 355-F1: 2 x RR Allison Engines, 2400 kg MAUW

  • AS 355-F2: 2 x RR Allison Engines, 2540 kg MAUW

  • AS 355-N: 2 x TM Arrius Engines, 2600 Kg MAUW

AV8 Helicopters Ltd


Agusta 109 power
Agusta 109 Power

2 x PW206 or Arrius 2 Engines, 2850 Kg MAUW

AV8 Helicopters Ltd


COMPARISON OF COMMON

SINGLE ENGINE AND TWIN ENGINE

HELICOPTERS: PAYLOAD AND RANGE

Typical Weights will vary with standard of equipment and cabin layout/trim

AV8 Helicopters Ltd


AGUSTA A109E POWER

SERIAL NO 11011

REGISTRATION NO 5N-BGX

(Former N108WP, N27BD)

AV8 Helicopters Ltd





A109-Power 5N-BGX

AV8 Helicopters Ltd




Survey Findings

# 2 engine intake shroud burnt/corroded

Oil leak in gearbox well area

Play in # 2 eng. Mounts

L.H. brake calliper leaking, main wheel contaminated

# 1 U/C actuator weeping

Mandolin frame repair – check safety of Hi-locks

T/R pitch change mechm. fixed link (pt.no. 109-0130-60-109) worn

T/R connecting link (2 off) [pt.no. 109-0133-04-105] worn to limits

0.25 inch crack in frame 8339.3 (ADF access panel, looking aft)

T/R/D/S bearings, rubber dust shields show signs of distress

ECS scat tube holed

P1 heater control knob missing

Very noisy fuel boost pump

Fuel Qty. indications mismatch (124/93 Kgs)

DME/Indicator inop.

ASI discrepancy (130/115 Kts.)

AV8 Helicopters Ltd


  • PENDING TECHNICAL BULLETINS

  • BT- 39 (Batt. Bus, Compliance due 31/03/04)

  • BT- 40 (Radio Master Sw., Compliance due 31/12/03)

  • BT- 41 (Emer. Bus relay. Repetitive?)

  • BT- 42 (Oil cooler hose, Compliance due 31/08/05)

  • BT- 43 (M.G.B attach. Hardware, Compliance due 30/09/04)

  • BT- 46 (Relocate ELT aerial, not mandated by National Authority, but is in Europe)

  • BT- 56 (Pitot heater, optional)

  • ITEMS SHORTLY DUE

  • BT - 57 (Audio warning panel, Compliance due 28/02/06)

  • BT - 59 (ECS overheat, Compliance due 30/09/06)

  • BT - 60 (U/C actuators, Compliance due 31/12/06)

  • BT - 61 (CAD’s, Compliance due 31/03/06)

  • BT - 63 (Fire control panels, Compliance due 30/04/06)

  • BT - 66 (Generator loom, Compliance due 31/07/06)

AV8 Helicopters Ltd


QUESTIONS?

AV8 Helicopters Ltd


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