Aerodata Flight Deck Performance Validity
Thread Starter
Joined: Mar 2011
Posts: 195
Likes: 4
From: Earth
Aerodata Flight Deck Performance Validity
Hello,
I am wondering if any Aerodata FDP users can tell me if their operation imposes limits on FDP validity. For example, if a new ATIS is issued with a 3 degree increase in temperature, or a calm wind changes to a 5 knot tailwind, is a new ACARS FDP required by procedure?
The TLR (pre-filled paper performance solution that is generated hours ahead of time) does have listed validity limits: OAT must be less than or equal to planned assumed temperature and equal to or greater than planned OAT minus 10 degrees C; altimeter setting must be equal to or greater than planned altimter setting - 00.10" HG or 3.4 HPA. Additionally weight must be no greater than planned weight and no less than planned -180,000 lbs (for my operator/airframe).
However no such restriction exists on the ACARS FDP that I can find. Is FDP validity left to crew judgement at most operators, or are limits imposed? Are the TLR validity requirements equally applicable to the FDP? Thanks in advance.
I am wondering if any Aerodata FDP users can tell me if their operation imposes limits on FDP validity. For example, if a new ATIS is issued with a 3 degree increase in temperature, or a calm wind changes to a 5 knot tailwind, is a new ACARS FDP required by procedure?
The TLR (pre-filled paper performance solution that is generated hours ahead of time) does have listed validity limits: OAT must be less than or equal to planned assumed temperature and equal to or greater than planned OAT minus 10 degrees C; altimeter setting must be equal to or greater than planned altimter setting - 00.10" HG or 3.4 HPA. Additionally weight must be no greater than planned weight and no less than planned -180,000 lbs (for my operator/airframe).
However no such restriction exists on the ACARS FDP that I can find. Is FDP validity left to crew judgement at most operators, or are limits imposed? Are the TLR validity requirements equally applicable to the FDP? Thanks in advance.
Joined: Dec 2001
Aviation Qualifications: ATPL
Posts: 3,766
Likes: 424
From: GA, USA
My employer:
FCOM 1 :
”FDP must be updated when:
FCOM 1 :
”FDP must be updated when:
- A performance related DDG item is added or removed
- There is a significant change in environmental conditions ( eg change of wind direction or speed, lower altimeter setting, higher temperature, runway surface conditions or contaminants)
- Departure runway not shown on FDP or intersection departure is shorter than planned”
