AH-64DField Manual v3.0
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Displays

ENG page

Engines, rotor and hydraulics at a glance. The page you watch during start-up, and the one that tells you what is wrong, and what to do, when something is.

PLTCPG

Open it with the A/C button, from MENU, or by pressing the boxed tab on any aircraft page.

T1 M B1 T2 B2 T3 B3 T4 B4 T5 B5 T6 B6 L1 R1 L2 R2 L3 R3 L4 R4 L5 R5 L6 R6 FCR WPN COM VID TSD A/C FLT FUEL PERF UTIL ACQ TADS ENG SYS ETF WCA TORQUE % TGT *C NP % NR % NP % 1 2 1 2 1 2 62 63 745 740 101 101 101 Np % NG % 93.1 93.0 1 2 HYD PSI PRI UTIL ACC 3010 3005 3000 1 2 3 4 5 6 7 8 9 10 11

ENG page in flight: both engines at 62% torque, Nr 101%, with the limit markings for both engines.

  1. 1Torque readouts Engine 1 and 2 torque, percent.
  2. 2Torque tapes Narrow and green in the normal range, wider and yellow in a time-limited range, widest and red past the maximum.
  3. 3Red limit bar The maximum, here 115% torque and 949 °C TGT for both engines.
  4. 4Yellow limit bars One per engine, where each time-limited range starts.
  5. 5TGT tapes Turbine gas temperature, degrees C.
  6. 6Np tapes Power turbine speed of each engine.
  7. 7Nr tape Main rotor speed: the chevron shape in the middle.
  8. 8Np Power turbine speed, digital.
  9. 9Ng Gas generator speed of each engine, percent.
  10. 10Hydraulics Primary, utility and accumulator pressure, psi. Here, at the top right, in every format but Ground.
  11. 11ACQ Acquisition source.

Formats

The lower half of the page changes with what you are doing:

Format When Lower half
Ground On the ground, with no warning or caution Engine oil pressure for both engines, and the hydraulic pressures.
Flight Airborne, with no warning or caution Empty.
WCA Any warning or caution active A box listing up to five of them.
Emergency A warning with an emergency procedure active That warning’s immediate action steps. See Emergency format.

In every format but Ground, the hydraulic pressures are at the top right.

While a starter is turning, a START box shows ON beside the engine being started.

T1 M B1 T2 B2 T3 B3 T4 B4 T5 B5 T6 B6 L1 R1 L2 R2 L3 R3 L4 R4 L5 R5 L6 R6 FCR WPN COM VID TSD A/C FLT FUEL PERF UTIL ACQ ENG SYS ETF WCA TORQUE % TGT *C NP % NR % NP % 1 2 1 2 1 2 0 0 420 15 0 0 0 START ON Np % NG % 25.3 0.0 1 2 HYD PSI PRI UTIL ACC 0 0 2990 ENGINE OIL PSI 31 1 0 2 1 2 3 4 5

ENG page on the ground during an engine 1 start: the starter is engaged and Ng is passing 25%.

  1. 1Starter START, with ON next to the engine whose starter is turning.
  2. 2Ng Move the power lever to IDLE above 23%.
  3. 3TGT Rises as the engine lights off.
  4. 4Engine oil pressure Ground format only.
  5. 5Torque limit With the rotor below 50%, torque is limited to 30%: the red bar.

Buttons

Button Label Action
T2 FLT Opens FLT.
T3 FUEL Opens FUEL.
T4 PERF Opens PERF.
T6 UTIL Opens UTIL.
R6 ACQ Opens the acquisition source list.
B1   MENU.
B6 WCA Opens the WCA page.

SYS and ETF are not simulated.

Reading the tapes

Torque and TGT have one tape per engine, with the digital value above it. In the middle, the two Np tapes sit either side of the rotor speed chevron, which should rest at 101% in flight. Ng is digital only, at the right.

The torque and TGT tapes change width and colour with the range they are in:

Tape Range
Narrow, green Normal.
Wider, yellow A time-limited range. A timer counts down the time left.
Widest, red Past the maximum.

The Np tapes and their digits, and the Ng digits, turn yellow and red the same way. Ng is also red when it is below 63% with the engine running.

Limit markings

The markings across the torque and TGT tapes are the aircraft’s actual limits:

  • The red bar across both tapes is the maximum.
  • Each yellow bar is where a time-limited range starts. There is one for each engine, with a gap between them.
  Both engines One engine
Torque Yellow at 100%, red at 115%. Yellow at 110% and 122%, red at 125%.
TGT Yellow at 810 and 870 °C, red at 949 °C. Yellow at 810, 870, 878 and 896 °C, red at 949 °C.

The markings move when the limits do:

  • They switch to the one-engine set when the aircraft counts as single-engine: when one engine’s torque falls below about half of the other’s.
  • With low rotor speed, torque is limited further. Below 90% Nr the red bar is at 70%, and below 50% Nr at 30%, with no time-limited range.

How long each range allows is on the HeliSim flight model page.

Timers

T1 M B1 T2 B2 T3 B3 T4 B4 T5 B5 T6 B6 L1 R1 L2 R2 L3 R3 L4 R4 L5 R5 L6 R6 FCR WPN COM VID TSD A/C FLT FUEL PERF UTIL ACQ TADS ENG SYS ETF WCA TORQUE % TGT *C NP % NR % NP % 0:03 9:41 1 2 108 109 835 872 101 101 101 Np % NG % 102.5 101.9 2 0:09 HYD PSI PRI UTIL ACC 3010 3005 3000 1 2 3 4

Both engines in a time-limited torque and TGT range, and engine 1 above its Ng limit. Torque and TGT each show one timer, centred, with the shorter time; the Ng timer is under engine 1 only.

  1. 1Yellow tape Wider and yellow in a time-limited range.
  2. 2Torque timer Both engines are over 100%, so one timer sits between the columns with the shorter time. TGT is the same: engine 2 is in the 870 °C range, with 10 minutes, and engine 1 in the 810 °C range, with 30.
  3. 3Ng, yellow Engine 1 above 102.2%.
  4. 4Ng timer Only engine 1 is in its timed range, so its timer takes the place of its number.

A white timer counts down the time left in a time-limited range, in minutes and seconds.

  • Torque, TGT and Ng have one timer each.
    • With one engine in a timed range, the timer takes the place of that engine’s number under its column.
    • With both engines in one, a single timer sits centred between the two columns and shows the shorter time.
  • Np has a timer for each engine, in place of its number.

When a timer reaches 0:00, the allowance is used up and the engine or drivetrain starts taking damage. A range with no allowance shows 0:00 as soon as you enter it.

Each range has its own allowance. It starts again from full each time you enter the range, so climbing into the next range and coming back resets it.

Emergency format

T1 M B1 T2 B2 T3 B3 T4 B4 T5 B5 T6 B6 L1 R1 L2 R2 L3 R3 L4 R4 L5 R5 L6 R6 FCR WPN COM VID TSD A/C FLT FUEL PERF UTIL ACQ TADS ENG SYS ETF WCA TORQUE % TGT *C NP % NR % NP % 1 2 1 2 1 2 62 63 745 740 101 101 101 Np % NG % 93.1 93.0 1 2 ENGINE 1 FIRE IN FLIGHT 1 AFFECTED ENGINE POWER LEVER - OFF WHEN CONDITIONS PERMIT 2 ILLUMINATED ENG FIRE BUTTON - PRESS 3 PRI DISCH BUTTON - PRESS IF FIRE BUTTON REMAINS ILLUMINATED 4 RES DISCH BUTTON - PRESS 5 LAND AS SOON AS POSSIBLE HYD PSI PRI UTIL ACC 3010 3005 3000 1 2

Emergency format for ENGINE 1 FIRE in flight: the immediate action steps in the lower half of the page.

  1. 1Title The warning and the procedure, black on white.
  2. 2Immediate action steps Numbered; an indented line continues or conditions the step above it.

When a warning with an emergency procedure is active, the lower half of the page shows that warning’s immediate action steps. The title is black on white; the steps are white and numbered, with conditions and continuations indented under the step they belong to.

Warning Procedure
ENGINE 1 FIRE or ENGINE 2 FIRE Engine fire in flight, or on the ground.
APU FIRE APU fire in flight, or on the ground.
AFT DECK FIRE Aft deck fire.
ENGINE 1 OUT or ENGINE 2 OUT Single engine failure. Both together: dual engine failure.
LOW ROTOR RPM Low rotor RPM, Np failed low.
ENG1 OVSP or ENG2 OVSP Engine overspeed, Np failed high.
HYD FAILURE Hydraulic failure.
TAIL ROTOR HYD Tail rotor hydraulic failure.

HIGH ROTOR RPM has no procedure, so it shows in the WCA list instead.

With more than one warning active, the page shows the most urgent: fires first, then engine failures, low rotor RPM, overspeed and hydraulics.

The full procedures, and what to do after the immediate actions, are on the Emergency procedures page.

Edit this page Written for v3.0 · Not affiliated with Boeing or the US Army