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RYR-738-JOCKEY
29th Oct 2007, 00:13
Ryanair is PRNAV approved, meaning RNAV SID's and STARS can be flown in LNAV, subject to ANP+raw data back-up. Some of our aircrafts have two FMCs and some have one. There seem to be a general acceptance to fly PRNAV procedures, regardless of having a single FMC. However, I've heard of certain check captains failing crew for the above reason.
Personally, I follow procedures and do what I'm told to..But I do feel comfortable with following the magenta-line, 'cause that's what you do in the cruise anyway. Dual or single FMC. If you lose your FMC...ask for vectors. Right??
Is the PRNAV approval subject to being equipped with dual FMC?
Secondly, what is SOP in other companies?
All opinions on the matter, much appreciated.

CaptainSandL
29th Oct 2007, 08:04
Only one FMC is required. JAA TGL 26 (MEL Policy) is the ref.

Carmoisine
29th Oct 2007, 08:25
However, I've heard of certain check captains failing crew for the above reason.

One wouldn't be a STN based line training Capt. Who does Circuit training also? English but with a funny foreign name?

RYR-738-JOCKEY
29th Oct 2007, 11:10
Ha, ha..etc. Yup.

Carmoisine
29th Oct 2007, 11:31
How predictable.

plain-plane
29th Oct 2007, 23:48
Well, well,
Turkish temperament:ugh:

Just compare part 8; 8.3.2.3 and 8.3.0.3.8… with the fact that FR crews now at selected places have (RNAV/GNSS) approaches published, that cannot be backed up by conventional NAV/APP aids …… RNP approaches……

((Pointed out to me by an overachieving FO recently)):hmm:

212man
29th Oct 2007, 23:53
TGL 26 mirrors the guidance in the FAA AC90-100. No dual FMC required.