FCOM Chapter 2 - Operating Limitations
2.1.2 - Main Dimensions
Span (without extended wingtips) - 21.44 m
Span (with extended wingtips) - 22.75 m
2.2.1 - Icing Conditions
Icing conditions exist when visible moisture in any form is present (such as clouds, fog with visibility of 1nm or less, rain, snow, sleet, ice crystals) or standing water, slush, or snow (excluding hard packed snow) is present on the ramps, taxiways or runways and the OAT or SAT is +5°C and below during ground and flight operation. In these conditions, or whenever the blue ICE SPD status light or EAI is on, the minimum speed for flight in icing conditions must be observed. IAS mode must be selected on the FD if climbing when these conditions exist.
2.2.2 - Airspeeds
Flaps may only be extended on the ground, as required for take-off, low altitude holding, approach and landing, up to a maximum altitude of 14,000ft.
Maximum flap speeds:
| Flap | Speed |
|---|---|
| 7 / 15 | 175 |
| 20 | 165 |
| 35 | 140 |
Maximum Landing Gear Speeds:
| Gear | Speed |
|---|---|
| Retraction (VLOR): | 150 |
| Extension (VLOE) / Extended (VLE): | 200 |
| Emergency Extension Speed (VLOEE): | 200 |
Min Control Speeds (VMCL):
| Aircraft | Speed |
|---|---|
| 340A | 103 |
| 340B | 106 |
| 340B WT | 103 |
Max Operating Speed (VMO):
VMO = 250kt up to F160, decreases as indicated by the VMO pointer to approx 210kt at F250.
Maximum Manoeuvering Speed (VA):
VA = 180kt
Caution
Full application of rudder and aileron controls, as well as maneuvers that involve angles of attack near stall, must be confined to speeds below VA
Maximum Rough Air Penetration Speed (VRA):
VRA = 190kt up to F210, decreases as indicated by the VMO pointer minus 30kt.
2.2.8 - Operational Limits
| Limit | Speed |
|---|---|
| Takeoff / Land Tailwind: | 10 |
| Landing Tailwind (MOD): | 15 |
| Crosswind: | 35 |
2.3.1 - Airborne Collision Avoidance System
Deviations from the ATC assigned altitude is authorised only to the extent necessary to comply with an ACAS Resolution Advisory (RA).
Maneuvers must not be based solely on information presented on the Traffic Advisory (TA) display.
2.3.2 - Flight Director
Use of flight director information in go-around mode during take-off is not authorised.
2.3.3 - Autopilot
Autopilot operations not authorised:
- Below 200 ft AGL - during take-off or go-around.
- Below 500 ft AGL - during cruise.
- Below 50 ft AGL - during approach.
- Below 100 ft AGL - for a non-coupled approach.
In icing conditions (as defined) FD/AP IAS MODE IS THE ONLY VERTICAL MODE TO BE USED
DURING CLIMB WHEN ICE ACCUMULATION IS OBSERVED OR IF IT IS NOT CERTAIN THERE IS NO ICE ACCUMULATION ON THE AIRCRAFT.
It is a requirement to disconnect the autopilot following an engine failure and re-trim the aircraft before re-engagement of the autopilot.
2.3.4 - Yaw Damper
Yaw Damper Operation is not authorised for:
- Take-off,
- Go-around, or
- Landing.
2.3.5 - Flap
Landing Flap is to be set by 300 ft radio height during normal landing.
When holding in icing conditions (as defined) Flap 0 must be used.
2.3.7 - Placards and Instrument Markings
Operating limits - RED
Caution, temporary or idle range - YELLOW
Normal operating range - GREEN
2.3.8 - Cargo Fire
- 60 min for 340B (WT) (2 bottles).
- 35 min for all other REX aircraft.
2.3.9 - Attitude/Heading Reference System
During initialisation on ground the aircraft must not be moved.
Take-off is not permitted until 2 min after initialisation completed and the attitude difference between the attitude displayed on both EADIs and the standby attitude indicator is 3 degrees or less (bank and pitch) and the heading on the compass card is not slewing away from the aircraft heading.
2.4.1 - Weights
| SF340B / WT: | (w/ MOD) | (w/o MOD) |
|---|---|---|
| MTW: | 13,740 kg | 13,290 kg |
| MTOW: | 13,605 kg | 13,155 kg |
| MLW: | 12,930 kg | |
| MZFW: | 12,020 kg |
| SF340A: | |
|---|---|
| MTW: | 12,840 kg |
| MTOW: | 12,700 kg |
| MLW: | 12,340 kg |
| MZFW: | 11,660 kg |
2.6.1 - Aircon / Pressurisation Limits
2.8.1 - Electrical Limits
2.8.1 - Fuel Limits
2.8.2 - Fuel System Limits
XFEED and CONN VALVE switches shall be in the OFF and CLOSED position during take-off and landing in normal operation.
2.11.1 - Ice and Rain Protection
2.12.1 - Altimeters, Operational Tolerances
Three altimeters are required for IFR operations. Two altimeters must read within 60ft of the nominated elevation. If the third altimeter has an error between 60ft and 75ft, flight to the first point of landing is approved. If the altimeter has an error more than 60ft on the second check, it must be considered unserviceable.
2.12.2 - Airspeed Indicator Operational Tolerances
2.13.1 - Landing Gear Operating Limits
2.15.1 - Engine and Propeller Limits
Dowty Rotol (A,B) / Hamilton Sundstrant (WT)
| 340B/WT (GE CT7-9B) | Limits | ||
|---|---|---|---|
| Power Setting | TRQ % | ITT | Prop |
| Takeoff + APR / Go Around 5 min 2 min |
107 107 |
940 950 |
1396 |
| Takeoff Only 5 min 2 min |
100 100 |
917 927 |
1396 |
| Max Continuous (OEI) | 100 | 944 | 1396 |
| Transient Except Takeoff (max 12s) | 112 | 965 | 1572 |
| Engine Start | 965 |
| 340A (GE CT7-5A2) | Limits | ||
|---|---|---|---|
| Power Setting | TRQ % | ITT | Prop |
| Takeoff 5 min |
108 |
930 |
1396 |
| Max Continuous (OEI) | 100 | 917 | 1396 |
| Transient Except Takeoff (max 12s) | 118 | 960 | 1572 |
| Engine Start | 960 |
Note
For hamilton sunstrand props, avoid steady state PRPM in 650-950 PRPM (except for checks)
Note
Eng Oil
- Engine oil temp 35° to 122°
- 132° allowed for 15 min
- Engine oil press 30 to 100 PSI
- 200 PSI allowed at starting and initial ground ops w/ extremely cold oil
Prop Oil
- Prop oil temp 45° to 93°
- 25° for ground ops and after T/O for max 5 min
- 93° for 15 min
- No operations abv ground idle when prop oil press 5-25 PSI or 140-225 PSI
Other
- Prop RPM abv 1396 indicates prop control system anomaly, although prop RPM up to 1456 is allowed for up to one hour at max continuous power
- Tq tolerance to selected CTOT value ±2%
- Max Tq diff. b/w indications w/ CTOT on 3%
- NG limits for start:
- Max for motoring: 26%
- Min stabilised prior to CL start: 17%
- Min prior to tailwind start: 20%
- Max ITT fluctuation ±5°
- ENG OIL PRESS warning when prop is in feathered position can be disregarded w/o further action if warning can be cleared by moving CL to unfeathered position
Caution
During cold weather if PL are not advanced to approx 75% Tq, 64° PLA may not be met.
For temp blw 0°C, approx 80% Tq is required. Tq blooming over the Reduced Power Tq setting (up to rated) is acceptable.
For a Rated takeoff, Tq should be set 15 - 20% below the rated TRQ to ensure the Rated Power is not exceeded.
Power Levers must be advanced to at least to 64° PLA as indicated by the AFT base of the Power Levers passing the yellow lines marked on the Power Lever Quadrant
ITT Exceedance Program (B Model Only)
- If ITT on takeoff incurs the 927/917° and 944° range, continue the takeoff. Note max ITT, take engine trend data for assessment on return to an engineering port
- If ITT exceeds 944°, abort the takeoff (PRIOR V1)
- If b/w 944° and 965° for < 12s after V1, provided the engine operates normally, continue the flight. Note max ITT, take engine trend data for assessment on return to an engineering port
- If abv 965° after V1, note max ITT and time at temp. Return to departure port and contact engineering
Note
Any ITT exceedance abv 965° requires engineering inspection upon further operation of engine During OEI operations, any exceedance abv max T/O power + APR ITT (950-940), record max ITT and time at temp, notify engineering
2.15.2 - Max Continuous Power (MCP)
Note
MCP is provided for OEI and extreme icing conditions (NOT for normal use).
This should, however, not prevent a pilot from using power deemed necessary in emergency / abnormal situation, or to prevent such a situation developing.
Note
PRPM is allowed up to 1396, but shall be reduced to 1384 by CL adjustment
2.15.6 - Starter / Gen Duty Cycle Limits
- Starter
- 2 start attempts, 3 min cooling in between, 25 min before subsequent starts
- Motoring
- 3 30 second ventilations, 3 min cooling in between, 1 hour before subsequent starts or motoring
- Time to light off (initial Ng rotation to ITT rise) - 20s (direct start only)
- Max time w/ starter engaged - 70s, of which max 30s is plain motoring