70 Engines Flashcards
Oil quantity required?
CEO and NEO
- 5 qt + 0.5 qt/h
10. 6qt + 0.45qt/h
When does ENG 1(2) OIL LO PR appear on CEO?
Oil pressure <13psi
N1 and N2 vibration advisory limits?
> 6 units N1
>4.3 units N2
Oil temperature advisory at?
> 140 degC
When does ENG 1(2) HI OIL TEMP show?
> 155 degC or > 140 degC for 15 mins
What are the engine oil pressure advisory limits?
> 90psi or <16psi
Maximum time on TOGA for one engine?
10 minutes (also dictates maximum single engine acceleration altitude)
Max time on TOGA two engines?
5 minutes
Maximum N1 limit CEO? And NEO?
104% CEO
101% NEO
Maximum N2 limit CEO? And NEO?
105% CEO
116.5% NEO
What is Tmax flex? And what are the limits for each type?
Highest flex temperature for derated takeoff.
A319 ISA+60 (75degC)
A320NEO ISA+55 (70degC)
A320CEO ISA+53 (68degC)
A321 ISA+52 (67degC)
Minimum flex temps for takeoff?
44degC for A320 (ISA+29)
45degC for A319 (ISA+30)
How do you calculate the Take Off Distance Required reduction possible due to a flex temp take off?
(Tflex - Toat)/10 * 3
Essentially, 10% of the difference between flex temperature and outside air temperature multiplied by 3.
So flex temp of 55degC, OAT of 15degC, TODR of 2000m…
(55-15)/10 * 3 = 12% so 1760m is actual TODR
Minimum oil temperature for start?
-40degC (same for NEO)
Minimum oil temperature for take off?
-10degC (or 19degC for NEO)
How many start attempts on CEO?
4 with 20 second pause between (then 15 minute cooling period)
How many start attempts on NEO?
3 with 60 pause between attempts (then 15 minute cooling period)
If CLOG appears on the ENGINE SD page next to the F. USED indication, why and where is the clog?
There is excessive pressure across the fuel filter
If CLOG appears on the ENGINE SD page next to the oil PSI indication, why and where is the clog?
There is excessive pressure across the main oil scavenge filter
Does the NEO have any differences in engine anti ice?
Yes
ENGINE SD page shows CORE and BOOST functions.
Where CORE indicates Variable Bypass Valves (VBVs) are used to provide hot air to engine core to prevent ice crystals
And BOOST uses bleed air from 7th stage of HP compressor to improve start performances and provide hot air to the booster
Which additional temperature does the NEO have on the ENGINE SD page?
Nacelle temperature