PERF

Press PERF to open PERF INDEX 1/2.

LSK	Label	Page
1L	PERF INIT	Performance initialization 1/3
1R	TAKEOFF	Takeoff speeds and configuration
2L	DEP LIM	Departure limit / VNAV capture
2R	CLIMB	Climb predictions
3L	CRUISE	Cruise predictions
4L	DESCENT	Descent predictions
4R	APP SPD	Approach speeds
5L	LANDING	Landing

DES FORECAST, GA LIM, FUEL MGT, and EO RANGE are shown on the index but are not implemented.

Thrust rating is a separate function key: TRS.

PERF INIT (1/3–3/3)

1/3 — TAIL #, PERF FACTOR, FUEL RESERVE, TO/LDG FUEL, ALTN FUEL. SEND REQST imports SimBrief performance (check that aircraft weight matches the OFP).

2/3 — CRZ ALT, STEP INC, CRZ WINDS, ISA DEV, ZFW, FUEL, TO CG, GROSS WT.

3/3 — climb / cruise / descent speed modes and COST INDEX. Speed-mode pages include ECON, LRC, MAX SPD, MAX END, and VMO/MMO.

CONFIRM INIT (LSK 6R, inverse white) appears on PERF INIT 3/3 once the required initialization fields are complete (cruise altitude, fuel, ZFW, takeoff CG, and gross weight). You must press it to confirm performance initialization.

Without CONFIRM INIT:

• The vertical profile (TOC / TOD) is not calculated

• VNAV path and the MFD vertical profile stay unavailable

• PERF DATA pages show blank values

After any change to PERF INIT data (weights, cruise altitude, fuel, winds, SimBrief import, etc.), CONFIRM INIT appears again and must be pressed before the FMS recalculates the vertical profile.

After confirmation, LSK 6R shows PERF DATA and opens the PERF DATA pages.

PERF DATA (1/3–3/3)

Reached from PERF INIT 3/3 via PERF DATA (LSK 6R) after CONFIRM INIT, or from LSK 6L on any PERF DATA page back to PERF INIT.

1/3 — cruise altitude, ceiling, step increment, and destination / alternate ETE, ETA, distance, fuel required, fuel remaining, and gross weight.

2/3 — cruise wind, tailwind component, and destination fuel preflight vs. updated plan (with difference after takeoff).

3/3 — fuel reserve and destination fuel plan comparison (preflight vs. live EFOB after takeoff).

LSK 6R on PERF DATA links to the next workflow page (DEPARTURE, TAKEOFF, or CLIMB, depending on flight phase and whether departure runway and V-speeds are set).

TAKEOFF

V1, VR, V2, VFS, flaps, pitch trim, and TO pitch. Links to TO INIT, DEP LIM, CLIMB, and LANDING.

TO INIT — runway heading, GW, pressure altitude / baro, elevation, slope, wind, runway condition (DRY / WET / CNTMNTD). SEND REQST can pull takeoff data from the OFP.

TO DATASET MENU is reached from TRS LSK 6R (TO-1/2/3, ATTCS, REF ECS, REF A/I, FLEX).

DEP LIM

Speed limit, AFE, VNAV CAP (default 800 ft AFE — altitude where VNAV captures after takeoff), and engine-out bank.

CLIMB / CRUISE / DESCENT

Prediction pages (TOC / TOD / BOD, speed command, transition altitude). DES NOW is available in descent when a path descent can be started early.

LANDING and APP SPD

Landing initialization, landing page, and APPROACH SPEEDS (fixed / green-dot / flap speeds).

TEMP COMP is entered from LANDING INIT (LSK 5R) after destination OAT is set. Full procedure: FMS Temp Compensation.