From some notes I wrote up a while ago for 737:
Failure on the ground or for a return to base:
- MEL 2-34-27 applies
- Our OPS MAN require MNPS routes to "be avoided"
- Flight without MNPS is not normally permitted in B-RNAV (RNP 5) airspace, but it is usual to obtain approval to proceed to a repair airport with ATC approval. (Jeppesen text, ATC pages 551-554)
- Repetitive Flight Plan (RPL) must be cancelled, and a new plan filed with "S & R" in item 10 removed and "STS/NONRNAV" entered in item 18
- The phrase "Negative RNAV" must be appended to each radio message initiating contact with each new ATC frequency.
- Take-Off and climb: standard schedule (280/0,79 for -300 or 280/.78 for -700)
- Required to manually set N1 bugs. On take-off set take-off thrust on PF's bug and MCT (for engine failure) on PNF's bug.
- Autothrottle not available for take-off. Climb power is available by setting autothrottle to arm and pressing N1 selector at acceleration altitude.
- Pitch modes available: TOGA, LVL CHG and V/S (ie no VNAV)
- Above FL150 disengage autothrottle (or deselect N1) and periodically bug & set the climb N1 on both N1 gauges as per the MAXIMUM CLIMB % N1 page in the QRH (As the PMCs are using engine inlet temp & pressure data, and being conservative, a significant performance degradation occurs in the climb thrust if you leave the autothrottle engaged without climb performance data from the FMC.)
- standard cruise speed from QRH (LRC in our company, but fixed Mach for others)
- Approaching cruise level extract target N1 from QRH FLIGHT WITH UNRELIABLE AIRSPEED/TURBULENT AIR PENETRATION (CRUISE) chart and bug this on PFs N1
- Extract limit N1 from MAXIMUM CLIMB % N1 QRH page and bug on PNFs N1
- Autothrottle may be used to maintain cruise.
- Inform ATC not RNP compliant.
- Approaching descent, calculate top of descent point QRH 0.74/250 DESCENT SPEED (ALL ENGINES) chart
- Prior to descent, set the Vref speed using the QRH VREF Chart
- Once the ATIS is received, set the N1 bugs to cover a missed approach from the QRH GO AROUND % N1 chart.
- Standard descent schedule (0.74/280/250)
- Auto-throttle can be used for descent & approach
- In the event of a missed approach, pushing TOGA will cause the auto-throttle to disengage. Manually set thrust, The flight director will display correct TOGA commands.
Experience shows that most FMC failures are of short duration, so it's worth checking it periodically by selecting INIT/REF or similar to confirm its status.