AC 91-89

Advisory circular · Mitsubishi MU-2B Training Program

Approved
July 22, 2016
Last reviewed
August 5, 2024
Family
AC 91-89 · 1 version
14 CFR parts
61, 91, 135, 141, 142

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed August 14, 2026.

Show pages 68–79
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Appendix A Figure B-10 MU-2B J (-35), K (-25), L (-36), M(-26)

APPROACH TO STALL LANDING

CONFIGURATION GEAR DOWN -

FULL FLAPS

CLEAR AREA, CONDITION LEVERS T/O AND LAND, SYNC OFF, ON STALL RECOGNITION (STICK SHAKER OR "ONSET BUFFET), CALL THE "STALL", 120/130 KCAS, AIRCRAFT TRIMMED *DISCONNECT AUTOPILOT IF ON, * OPTIONAL AUTOPILOT ON FOR IMMEDIATELY AND SIMULTANEOUSLY REDUCE ANGLE OF ATTACK UNTIL STALL AIRCRAFT WITHOUT AUTOMATIC AUTOPILOT DISCONNECT. POWER SLOWLY AS APPROPRIATE, FLAPS 20°, POSITIVE RATE, GEAR UP, TRIM AS INDICATIONS CEASE AND LEVEL WINGS IF IN A BANK, ACCELERATE, INCREASE NECESSARY. STALL WARNING MAY ACTIVATE AT 4 TO 9 KCAS ABOVE STALL. FLAPS UP POWER AS A/S 140 KCAS MIN, REQUIRED FLAPS 20°, GEAR DOWN, (20% TORQUE) CONTINUE TO APPLY AFT

CONTROL, WHILE MAINTAINING AFTER A SAFE FLIGHT CONDITION A/S 120 KCAS, ALTITUDE UNTIL FIRST HAS BEEN ACHIEVED AND AS A/S FLAPS FULL 20% INDICATION OF A STALL.. INCREASES ABOVE 120 KCAS, TORQUE, * OR ALLOW AUTOPILOT TO BEGIN CLIMB TO ORIGINAL MAINTAIN LEVEL CONTINUE TO TRIM NOSE UP ALTITUDE AND/OR FLIGHTPATH.

FLIGHT, TRIM WHILE MAINTAINING ALTITUDE FOR 120 KCAS UNTIL FIRST INDICATION OF A A/S 130 KCAS, IF FLAPS STALL.. 20°, RETRACT FLAPS TO 5° INCREASE PITCH TO APPROX. 10°.

INSTRUCTOR NOTE:

ADVISORY CIRCULAR 120-109 STALL SPEEDS STATES THAT PERFORMANCE OF FLAPS SET 5 20 40

STALL MANEUVERS DURING TRAINING SHOULD INCLUDE BOTH GR.WT. K/M/ J/L K/M/J/L K/M/ J/L KIM/JIL RESPOND APPROPRIATELY TO THE MANUAL FLIGHT AND FLIGHT WITH AUTOPILOT ENGAGED. PILOTS SHOULD BE TAUGHT HOW TO 5,000 AGL MIN. ALT. 7,000 7,500 8,000 8,500 85/ 85/ BB / BB/ 91/ 91/ 90/ 94/ 94/ 93/ B8/ 85/ 84/ BO/ BOV B3/ B3/ 89/ 8B/ 87/ 72/ T2/ 77/ 77/ 74/ 74/ 75/ 79/ 79/ 77/ 69/ 68/ 69 84/ 84/ 87/ 88/ 71/ 70/ 71/ ENCOUNTERING AN UNEXPECTED STARTLE FACTOR WHEN 9,000 9,500 97/ 96/ 95/ 93 99 /99/ 98/ 98 91/ 91/ 89/ 88 90/ 90/ 92/ 90 82/ 81/ 79/ 77 84/ 83/ 81/ 79 75/ 74/ 75/ 74 73/ 72/ 73/ 72 STALL.. 9,920 101/ 95/ 85/ 78/ 10,000 /102/100/ 98 / 98/ 94/ 922 / 88/ 84/ 81 / 76/ 77/ 76 10,470 /104/ / BB/ / 7B/ STALL TRAINING PROCEDURES 10,500 /103/101 / 96/ 94 / 851 83 / 79/ 77 WITH THE AUTOPILOT ENGAGED 10.800 /104/ / 97/ / BO/ 7B ARE NOTED WITH AN ASTERISK* 11,000 /103 / 97 / 85 / 79 11,500 /106 / 99 / 87 / 81 A-74

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Appendix A Figure B-11 MU-2B J (-35), K (-25), L (-36), M(-26)

ACCELERATED STALLS CLEAR AREA, CONDITION CLEAN, A/S 115 KCAS, INITIATE PROGRESSIVE BANK TOWARD A LEVERS T/O AND LAND, A/C POWER AND TRIM 60° BANK ANGLE

SYNC OFF FOR LEVEL FLIGHT

APPLY BACKPRESSURE TO

MAINTAIN ALTITUDE UNTIL

FIRST INDICATION OF A STALL OR "ONSET" BUFFET.

* 140KCAS * 130KCAS FLAPS UP FLAPS TO 5° * POSITIVE

RATE, GEAR UP ACCELERATE TO 140 KCAS, ON STALL RECOGNITION (STICK SHAKER OR POWER AS REQUIRED "ONSET" BUFFET), CALL THE "STALL",

AFTER A SAFE IMMEDIATELY AND SIMULTANEOUSLY

STALL SPEEDS (APPROXIMATE) FLIGHT CONDITION REDUCE ANGLE OF ATTACK UNTIL STALL

BANK AT MAXIMUM GROSS TAKEOFF WEIGHT J, K, L, M ACHIEVED AND AS HAS BEEN ACCELERATE, INCREASE POWER SLOWLY AS INDICATIONS CEASE, LEVEL WINGS, ANGLE 10 20 30 40 50 60 A/S INCREASES APPROPRIATE, TRIM AS NECESSARY FLAPS JIL/KIM JILIKIM JILIKIM J/L/K/M J/LIK/M JILIKIM ABOVE 120 KCAS, BEGIN CLIMB TO STALL WARNING MAY ACTIVATE AT 4 TO 9 KCAS ABOVE STALL.

UP 106/107/102/105 108/109/105/108 112/114/109/112 120/121/116/120 130/132/126/130 148/150/143/147 ORIGINAL ALTITUDE 5° 99/100/ 96/98 101/102/ 98/101 105/107/102/105 112/113/109/112 122/123/119/122 138/140/134/138 FLIGHTPATH. AND/OR 20° 87/ 88/ 86/ 88 89/ 90/ 88/90 92 /94/92/ 94 98/100/97/100 108/109/107/109 122/123/120/123 40° 81/ 82/ 77/ 79 83/ 84/ 79/ 81 86/ 87/ 82/ 84 92/ 93/ 87/ 90 100/102/96/98 112/115/108/110 A-75

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Appendix A Figure B-12 MU-2B J (-35), K (-25), L (-36), M(-26)

EMERGENCY DESCENT (LOW SPEED) *CLEAR AREA, CRUISE POWER LEVERS F/. CONDITION LEVERS T/O AND LAND, CONFIGURATION START SYNC OFF. GEAR AND FLAPS EXTEND AT SPEEDS BASED AT ASSIGNED ALTITUDE. ON SCHEDULE FOR MODEL AND S/R10 COMPLIANCE UNTIL A/S 150 KCAS MIN. FULL FLAPS ARE DEPLOYED SIMULATE EXPLOSIVE ESTABLISH DESCENT IN A 30° BANK, NOSE DOWN DECOMPRESSION AT APPROXIMATELY 20°, UNTIL REACHING MAXIMUM FULL ASSIGNED ALTITUDE FLAP SPEED ALLOWED (Vfe), THEN RAISE THE NOSE OXYGEN MASKS ON TO MAINTAIN SPEED.

"DECLARE EMERGENCY" *WHILE CLEARING THE AREA, AFTER ESTABLISHING DESCENT, ROLL CHECK 1000 FT COORDINATE WITH AIR TRAFFIC CONTROL TO CLEAR TRAFFIC AT LOWER ALTITUDES. STEADY HEADING OR AS REQUIRED BY ATC. WINGS LEVEL. CONTINUE DESCENT ON ABOVE LEVEL OFF ALTITUDE GEAR/FLAP SPEEDS 500' ABOVE, START LEVEL OFF

FOR GEAR/FLAP SPEEDS SEE

TABULAR CHART ON REVERSE SIDE OF PROFILE. COMPLETE EXERCISE AT ASSIGNED ALTITUDE REDUCE TO 120 KCAS AND CLEAN UP A/C. **DO

NOT RAISE FLAPS UNTIL A/C IS BELOW MAXIMUM ALLOWABLE Vfo SPEED FOR FULL FLAPS.

A-76

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Appendix А Figure B-12a

GEAR AND FLAP EXTEND SCHEDULE (K+ AND J+ ARE MODIFIED BY S/R10) GEAR K, K+: 160 KCAS M, J, d+: 170 KCAS L: 175 KCAS FLAPS 20° 40° J: S/N 548 - 609 NOT MODIFIED BY S/R10 146 KCAS 146 KCAS 120 KCAS J+: S/N 548 - 609 MODIFIED BY S/R10 AND S/N 610 - 654 175 KCAS 146 KCAS 120 KCAS K: S/N 239 - 279 NOT MODIFIED BY S/R10 140 KCAS 140 KCAS 120 KCAS K+: S/N 239 - 279 MODIFIED BY S/R10 AND S/N 280 - 318 175 KCAS 140 KCAS 120 KCAS L / M 175 KCAS 155 KCAS 120 KCAS A-77

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Appendix A Figure B-13 MU-2B J (-35), K (-25), L (-36), M(-26)

EMERGENCY DESCENT (HIGH SPEED) *CLEAR AREA, CRUISE POWER LEVERS F/I. NOTE

CONFIGURATION START CONDITION LEVERS T/O AT ASSIGNED ALTITUDE. AND LAND SYNC OFF. DECREASE INDICATED A/S 150 KCAS MIN. AIRSPEED BY 5 KCAS BELOW 250 KCAS, FOR EACH 1,000 FT ABOVE 21,300 FT

SIMULATE EXPLOSIVE

DECOMPRESSION AT ASSIGNED ALTITUDE. ESTABLISH DESCENT IN A 30° BANK, ACCELERATING DECLARE EMERGENCY OXYGEN MASKS ON. TO VMo (250 KCAS). INITIAL 15-20° NOSE DOWN, REDUCING TO APPROX. 8° NOSE DOWN AS A/S APPROACHES Vmo (250 KCAS).

CHECK 1000 FT *WHILE CLEARING THE AREA, AFTER ESTABLISHING DESCENT, KEEP WINGS ABOVE LEVEL TO CLEAR TRAFFIC AT LOWER ALTITUDES. COORDINATE WITH AIR TRAFFIC CONTROL LEVEL, CONTINUE DESCENT ON STEADY HEADING OR AS REQUIRED BYATC OFF ALTITUDE 700 FT ABOVE, START

LEVEL OFF COMPLETE EXERCISE AT ASSIGNED ALTITUDE.

REDUCE SPEED TO 200 KCAS A-78

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Appendix A Figure B-14 MU-2B J (-35), K (-25), L (-36), M(-26)

UNUSUAL ATTITUDE RECOVERY (NOSE HIGH) UNLOAD AND INITIATE ROLL TOWARD 60° BANK

USING SPOILER AND RUDDER AND ALLOW NOSE TO

FALL THROUGH THE HORIZON

CAUTION

DO NOT G LOAD WINGS DURING BANKING

MANEUVER TO PREVENT AN ACCELERATED STALL *IF ATOR NEAR STALL BEFORE RECOVERY, DO NOT USE RUDDER TO INITIATE ROLL.

UPON RECOGNITION OF A NOSE

HIGH UNUSUAL ATTITUDE, WHEN NOSE LOW, ROLL WINGS

POWER TO TAKEOFF LEVEL, REDUCE POWER TO

FLIGHT IDLE, AND COMMENCE A

WINGS LEVEL PULL UP TO A LEVEL FLIGHT ATTITUDE.

*CLEAR AREA

ONCE LEVEL, ADD POWER

TO MAINTAIN LEVEL FLIGHT *WHILE CLEARING THE AREA, COORDINATE

WITH AIR TRAFFIC CONTROL TO CLEAR TRAFFIC BOTH ABOVE AND BELOW YOUR ALTITUDE.

INSTRUCTOR NOTE

THE INSTRUCTOR SHOULD INITIATE THE UNUSUAL ATTITUDE NOT TO EXCEED 30° OF PITCH AND/OR 60F OF BANK AND USE POSITIVE

CONTROL TO TRANSFER CONTROL TO THE

STUDENT FOR RECOVERY A-79

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Appendix A Figure B-15 MU-2B J (-35), K (-25), L (-36), M(-26)

UNUSUAL ATTITUDE RECOVERY (NOSE LOW)

UPON RECOGNITION OF ANOSE LOW

UNUSUAL ATTITUDE, REDUCE POWER

TO FLIGHT IDLE, INITIATE A ROLL

TOWARD WINGS LEVEL IF IN A BANK, *CLEAR AREA AND MAINTAIN NOSE LOW PITCH

ATTITUDE WHILE LEVELING WINGS

ONCE WINGS ARE LEVEL IN NOSE LOW

ATTITUDE, COMMENCE A WINGS LEVEL PULL UP TO A LEVEL FLIGHT ATTITUDE.

CAUTION

DO NOT G LOAD AIRCRAFT UNTIL WINGS

ARE LEVEL TO PREVENT AN ACCELERATED

STALL AND UNEVEN G LOADS ON WING IF AIRSPEED IS ATOR NEAR Vmo, DO NOT

USE ABRUPT CONTROL MOVEMENTS *WHILE CLEARING THE AREA, COORDINATE WITH DURING RECOVERY.

AIR TRAFFIC CONTROL THE CLEAR TRAFFIC BOTH ABOVE AND BELOW YOUR ALTITUDE. ONCE LEVEL, ADD POWER

TO MAINTAIN LEVEL FLIGHT

INSTRUCTOR NOTE

THE INSTRUCTOR SHOULD INITIATE THE UNUSUAL ATTITUDE NOT TO EXCEED 30° OF PITCH AND/OR 60° OF BANK AND USE POSITIVE

CONTROL TO TRANSFER CONTROL TO THE

STUDENT FOR RECOVERY A-80

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Appendix A Figure B-16 MU-2B J (-35), K (-25), L (-36), M(-26) NORMAL LANDING (20°or 40° FLAPS) TOUCHDOWN. POWER LEVERS RETARD TO FLIGHT IDLE STOP. THEN RETARD BOTH POWER LEVERS TO START (GROUND IDLE). CHECK BOTH PROPS BETA.

APPROXIMATELY THEN REVERSE AND BRAKES AS REQUIRED.

1500 FT AGL THRESHOLD (10%-20% TORQUE) Vref PARALLEL TO RUNWAY MAINTAIN TRACK FINAL CHECK. FLAPS 20°or 40°.

A/S SLOWING TO Vref.

CHECK SINK RATE 500-600 FPM

COMPLETE DESCENT AND

APPROACH CHECKLIST A/S 120 KCAS MIN DESCENT. 500-600 FPM (25%-30% TORQUE) A/S 150 KCAS MIN. APPROACH BY STABILIZED (20%-25% TORQUE) LANDING APPROACH SPEEDS Vref 500'agl J. K. L. M FLAPS 20° (1.3 Vs1) FLAPS 40° (1.5 Vs1) WEIGHT K M L K M FLAPS 5° iS SEC 7,000 93 96 96 7,500 96 100 93 99 100 100

8.000 100 103 96 103 103 103 LANDING ASSURED, GEAR DOWN, 8,500 9,000 103 106 106 109 100 103 99 99 109 106 106 109 106 109 105 108 A/S 140 KCAS (J, L, M, K+) MIN, 9,435 108 112 130 KCAS (K) MIN, 9,500 112 106 103 112 112 111 COMPLETE LANDING CHECKLIST 9,955 115 115 10,000 109 105 115 114 FLAPS 20°, 10,260 110 117 A/S 120-130 KCAS. 500 FPM SINK RATE 10,500 11.000 108 110 117 119 (APPROX 25% TORQUE)

11.025 110 119 A-81

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Appendix A Figure B-17 MU-2B J (-35), K (-25), L (-36), M(-26)

GO AROUND - REJECTED LANDING

AFTER GEAR IS FULLY RETRACTED, IF FLAPS 20° RETRACT FLAPS TO 5°.

INCREASE PITCH TO APPROX. 10°, ACCELERATE TO 130 KCAS (K, NOT MOD SR10), DESIRED CLIMB SPEED 140 KCAS (K MOD SR10) (J, L, M)

COMPLETE AFTER T/O

AND CLIMB CHECKLIST A/S 140 KCAS FLAPS UP.

WHEN LANDING REJECTED, APPLY MAX POWER, PITCH 8° UP AND SELECT FLAPS 20° IF 40°

PREVIOUSLY SELECTED

POSITIVE RATE, GEAR UP. IF FLAPS NORMAL 20°, 113 KCAS MIN APPROACH, IF 5° FLAPS STABILIZED AND 120 KCAS (J, L) MIN CONFIGURED FOR 125 KCAS (K, M) MIN

LANDING A-82

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Appendix A Figure B-18 CAUTION MU-2B J (-35), K (-25), L (-36), M(-26)

DO NOT SELECT REVERSE UNTIL NO FLAP OR 5° FLAP LANDING (ABNORMAL PROCEDURE) BELOW 90 KCAS

WITH NOSE WHEEL ON GROUND CHECK BOTH PROPS BETA. BRAKES AND NOTE REVERSE AS REQUIRED. NOTE: BETA MAY NOT BE AVAILABLE UNTIL BELOW 90 KCAS LANDING DISTANCE WILL INCREASE

APPROXIMATELY APPROXIMATELY 1500 FT AGL TOUCHDOWN - POWER 30%

LEVERS SLOWLY RETARD TO

FLIGHT IDLE, THEN START (GROUND IDLE).

THRESHOLD (10%-20% TORQUE).

PARALLEL TO RUNWAY MAINTAIN TRACK NO FLAP Vref 1.25 Vs1, BUT NOT BELOW 115 KCAS (SEE CHART) COMPLETE DESCENT FINAL CHECK. A/S

AND APPROACH SLOWING TO NO FLAP CHECKLISTS Vref. (SEE CHART) A/S 150 KCAS MIN.

NO FLAP Vref 1.25 Vs1 (BUT NOT BELOW 115 KCAS) USE FOR LAP UP OR 5° (25%-30% TORQUE) APPROACH BY STABILIZED 500 agl FLAPS UP FLAPS 5° 1.5 MILES MINMUM

WEIGHT K M M 7,500 115 115

8.000 115 115 115 115 115 115 CHECK

8.500 117 118 118 115 115 115 LANDING ASSURED, GEAR DOWN SINK RATE

9.000 119 122 117 120 115 115 115 115 A/S 140 KCAS MIN.

9,435 124 117 COMPLETE LANDING CHECKLIST

9.500 123 120 124 115 115 117

9.955 127 119

10.000 10.260 125 128 123 118 115 A/S 140KCAS MIN. FLAPS 0° OR 5º.

10.500 127 118 (APPROX 25%-30% TORQUE) 500-600 FPM SINK RATE.

11,000 129 124

11.025 129 124 A-83

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Appendix A Figure B-19 MU-2B J (-35), K (-25), L (-36), M(-26)

CAUTION ONE ENGINE INOPERATIVE LANDING

ANTICIPATE

SWERVE TOWARD WHILE MAINTAINING TRACK WITH TOUCHDOWN, CAUTION WARNING

OPERATING ENGINE RUDDER, MOVE OPERATING ENGINE OPERATING ENGINE

WHEN ENTERING BETA IDLE), CHECK PROP BETA, REVERSE POWER LEVER START (GROUND POWER LEVER SLOWLY RETARD TO FLIGHT IDLE DO NOT USE SINGLE ENGINE REVERSE DO NOT ATTEMPT A GO-AROUND WITH AND BRAKES AS REQUIRED. STOP SIMULATED FAILED THRUST WITH THE GEAR DOWN BELOW 400' AGL OR AFTER APPROXIMATELY ENGINE POWER LEVER 20° FLAPS ARE 1500 FT AGL ABOVE FLIGHT IDLE SELECTED THRESHOLD, (10%-20% TORQUE). Vref.

PARALLEL TO RUNWAY MAINTAIN TRACK A/S 110 KCAS (J, L), 105 KCAS (K, M) CHECK SINK RATE 300-600 FPM FINAL CHECK. FLAPS 20P.

A/S Vyse MIN. (SEE CHART)

COMPLETE DESCENT AND COMPLETE LANDING CHECKLIST,

APPROACH CHECKLISTS AND RUDDER TRIM CENTERED, HOLD

REVIEW SINGLE ENGINE LANDING BALL IN CENTER WITH RUDDER

CHECKLIST A/S 150 KCAS 140 KCAS MIN (J, L), 135 KCAS MIN APPROACH BY STABILIZED (K, M). (APPROX 60%-70% TORQUE) AS REQUIRED 500'agi

J, K, L, M FLAP SETTING UP Vxse (KCAS) 140 / 135 * Vyse (KCAS) 150 / 150 * FLAPS 5ª A/S 140 KCAS (130 KCAS MIN) SINK RATE 500 - 600 CHECK 20° 5° 125 / 125 * 130 / 130 * 140 / 140 * 135 / 130 * FEET PER MINUTE *K, M LANDING ASSURED CHECK GLIDE PATH. GEAR DOWN.

(APPROX 45%-55% TORQUE) A-84

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Appendix А Figure B-20 MU-2B J (-35), K (-25), L (-36), M(-26)

CROSSWIND LANDING

DEMONSTRATED

CROSSWIND

ALL MODELS TAKEOFF 22 KCAS LANDING 18 KCAS

• WIND • WIND

AIRCRAFT WILL BE FLOWN DOWN AN EXTENSION OF

THE RUNWAY CENTER LINE WITH DRIFT CORRECTION

ESTABLISHED SUFFICIENTLY IN ADVANCE TO PERMIT

CENTER LINE TO BE FLOWN WITH ONLY MINOR

COORDINATED CORRECTIONS INCREASE Vref FOR CROSSWIND LANDING BY ONE-

HALF THE STEADY WIND SPEED PLUS ONE-HALF THE GUST SPEED NOT TO EXCEED Vref PLUS 10 KCAS.

WIND

PRIOR TO TOUCHDOWN, THE UPWIND WING IS LOWERED AND SMOOTHLY MODULATED. OPPOSITE

RUDDER IS APPLIED SO THAT AIRCRAFT PATH CONTINUES DOWN RUNWAY CENTERLINE. THE

AIRCRAFT SHOULD NOT BE ALLOWED TO DEVELOP ANY TENDENCY TO DRIFT DOWNWIND.

NOTE: RUDDERS CENTERED BEFORE NOSE WHEEL TOUCHDOWN. SPOILERS INTO WIND AS NECESSARY

TO KEEP WINGS LEVEL

• WIND A-85