You’re flight planning a 767 to FL430. Can you accept that altitude?
Yes. Max certified altitude is 43,100 ft (767) or 42,000 ft (757). FL430 = 43,000 ft is acceptable for 767 only, but FL430 exceeds 757 limits. Limited by structural pressurization differential.
Dispatching to a high-altitude airport — what’s the maximum takeoff/landing pressure altitude?
8,400 PA for both aircraft types.
Ground crew asks about runway slope limits for the 757/767. What do you tell them?
± 2% slope maximum.
Cargo door is open in canopy position during ground ops — what’s the wind limit?
60 knots with cargo door in canopy position. 40 knots with cargo door full open.
You need to make a 180° turn on a narrow taxiway. Minimum pavement width required?
129 feet for a 180° turn.
What’s VMO/MMO for the 757/767?
360 KIAS / 0.86 Mach
Checking tire speed limits before a high-speed taxi — what’s the maximum?
235 MPH wheel speed.
Minimum engine oil quantity for dispatch?
17 quarts.
What’s the minimum fuel temperature you can operate with?
3°C above the freezing point of the fuel type being used.
Which tank provides the fuel temperature indication? (757 vs 767)
Left tank (767). Right tank (757).
What are the fuel capacities for each aircraft type?
757: 75,000 lbs. 767-200/300: 112,000 lbs. 767-300ER: 162,400 lbs.
What PSI do wing tank pumps produce vs center tank pumps?
Wing tank pumps: 15 PSI. Center tank pumps: 30 PSI. (Higher pressure ensures center tank fuel is used first.)
When does motive flow start pulling fuel from the center tank?
When wing tanks reach half full. Motive flow from wing pumps scavenges remaining center tank fuel.
Center tank pumps won’t operate on the ground unless what conditions are met?
Either: Engines at 50% N2, OR refueling panel door is open. (Safety interlock prevents pumping during refueling ops.)
When does the DC fuel pump operate?
On battery power only, OR for a left engine relight. You cannot control it manually.
Will the left forward A/C pump run whenever the APU is running?
Yes — cannot be shut off as long as APU is running.
Two rules for crossfeeding fuel?
Rule 1: Don’t crossfeed until cruise + 20 minutes (allow systems to stabilize). Rule 2: Open crossfeed valve BEFORE turning crossfeed pumps off (prevents vapor lock).
EICAS shows ‘FUEL QTY ERROR’ — what does this mean?
3,000 lb discrepancy (±) between FMC calculated fuel and the totalizer. Investigate the cause.
EICAS shows ‘LOW FUEL’ — how much fuel remains?
Less than 2,200 lbs (±500 lbs) in a tank.
EICAS shows ‘FUEL CONFIG’ — what’s the issue?
Tank imbalance of 2,000 lbs (±500 lbs). Consider crossfeed to balance.
How many hydraulic coolers are in the fuel tanks?
3 total: 1 in left tank, 2 in right tank.
Roughly how much fuel provides 1 hour of flight?
767: ~10,000 lbs/hour. 757: ~8,000 lbs/hour. (Useful for quick bingo fuel calculations.)
Is there an altitude limit for starting the APU?
No limit, but starts may be difficult above FL350 due to thin air.
How much fuel does the APU burn per hour?
Approximately 400 lbs/hour.