This is an excerpt from the Honeywell FMGS manual:
BANK ANGLE LIMITS
The bank angle limits, roll limit 1, and roll limit 2 are defined by the roll
limit graph shown in Figure 5-3 and are based on true airspeed. During
an engine out condition, both limits are set at 15°.
Control Roll Limit
During selected headingmode, the flight guidance part of the computer
imposes the roll limits.
During managed heading mode, the flight management part of the
computer imposes the roll limits based on true airspeed and the active
segment of the active leg, depending on the need for simple turn control
(the path over the ground is not fixed) or fixed path control (a defined
path over the ground).
D For simple turn control (while turning to a heading target) roll limit 2
is imposed.
D For fixed path control (in legs to capture a path) the FMS uses either
roll limit 1 or roll limit 2 as required below:
— Roll limit 1 - When the turn does not result in a captured and
engaged leg.
— Roll limit 2
D When flying an arc to capture and engage a leg
D When flying an arc to a fix unless:
- The active leg is a holding pattern or procedure turn when
roll limit 2 is imposed.
- The aircraft is within lateral overshoot navigation limits,
(then the en route roll limit is 15°), except in the terminal
area where roll limit 2 is imposed.
The roll limit for lateral path construction is always the bank limit, roll
limit 1, or roll limit 2 for a specific true airspeed.
FMS Roll Limit
Figure 5-3
NOTE: Below 700 ft radio altitude, when in LAND track and LOC
track, bank angle is further limited to 10° by the flight
guidance function.
ROLL LIMIT SUMMARY
Roll limit 1 is used for most straight line segments of a flight leg, and by
the FMS when the heading is managed.
Roll limit 2 is used by the FMS on most managed transitions in the
terminal area, and for specific procedures such as holding patterns,
procedure turns, and arcs.
FCOM 3.2.10 p5 (eng fail after V1) however has the following:
IN TURN FOLLOW FD OR AP* ORDER. WITH NO AP/FD LIMIT BANK ANGLE TO 15deg UP TO F, S, GREEN DOT.
*BANK ANGLE IS LIMITED TO:
-15deg UP TO (MANEUVERING SPEEDS - 10 KTS)
-THEN, LINEAR INCREASE TO 25deg UP TO (MANEUVERING SPEEDS - 3 KTS)
-25deg ABOVE (MANEUVERING SPEEDS - 3 KTS)
The FCOM contradicts the Honeywell manual in stating that bank limit can be above 15 deg with OEI.
Your thoughts??