MH60T Trivia #151-175
This trivia series distills over 20 years of flight manual study into 500+ focused questions and answers, posted in 25 question sets. It’s not a substitute for the manual, but rather an aid to facilitate study and strengthen airmanship. During your review, ask yourself: How is this operationally relevant? Do I need to memorize it, or just be familiar with it? Should I review more on this topic?
151. Q: How are FUEL LOW cautions and fuel quantity related?
A: They are not designed to be related. Fuel low level warning system is designed to be a completely independent system from the fuel quantity sensors *** However, currently as of 8/25, CAAS programming does not reflect this – if the fuel levels go below 225 lbs. the FUEL LOW caution will appear.
152. Q: ALL STORES SONO will not jettison a tank below?
A: 1/3rd full (approximately 272 lbs. for 120s and 180 lbs. for 80s, 256 lbs. for 113s and 170 lbs. for 75s).
153. Q: Criteria that results in a BINGO FUEL advisory?
A: There is insufficient fuel to complete the existing flight plan with the reserve fuel remaining at the final FPP
*** Note – CAAS uses some “sensed” performance data (torque, winds, ground speed, altitude, etc.) for a portion of the active leg however the fuel planning reflected in the flight plan summary is largely determined by user input (programmed airspeeds, altitudes, winds, etc.) garbage in = garbage out
154. Q: How are the engines primed?
A: Hold the PCL in lockout, select the fuel prime switch position.
155. Q: PUMP VALVE FAIL caution indicates?
A: Fuel is transferring but one or more elements of the transfer system (a valve and or pump) failed to operate.
156. Q: Describe the sequence of pump/valve events during the auto fuel transfer process?
A: #1 pump on, #1 valve open. If no flow in 5 mins, #1 valve closed, #2 valve open. If flow sensed, pumping continues, the PUMP/VALVE FAIL caution appears. If no flow sensed within 40 secs, #1 pump off and the #2 pump on. If flow sensed, pumping continues, and the PUMP/VALVE FAIL caution appears. If no flow sensed within 40 secs, FUEL XFER FAIL caution appears
***Note: there is no combo for #2 pump on, #1 valve open.
*** Note: there is a bite indicator on the FMCP – when it is white, it indicates that failure to transfer fuel in “auto” is a “logic” problem, not an issue with the pumps or valves.
157. Q: In manual transfer, which pumps/valves operate and how do they relate to cautions?
A: Both pumps and valves operate and neither of the cautions will illuminate with a fault.
158. Q: Which tank is the APU fueled from?
A: Right.
159. Q: Normal sequence for power on fueling?
A: Mains, LT outer, LT inner, RT.
160. Q: For power off fueling, how are the tanks filled?
A: All are filled simultaneously.
161. Q: During power on fueling, how do you prevent the aux tanks from being filled?
A: Put the FMCP switch in stop flow.
162. Q: Minimum refueling distance from structures, vehicles, smoking?
A: 50′.
163. Q: Min. refueling distance from operating radar
A: 300′.
164. Q: Restrictions when gravity refueling?
A: The engines and APU cannot be running.
165. Q: How will the main and aux tanks be filled during gravity fueling?
A: Each will have to be filled individually through their gravity filler port (no shut-off valve; proceed carefully to avoid spills).
166. Q: #1 and #2 BST PUMP OFF advisory lights?
A: Pressure is not sensed in the mains from the pumps; indicates boost pump is either off or failed.
167. Q: Amount of time intermediate and tail gearboxes operate w/o oil?
A: 60 mins.
168. Q: With loss of tail rotor control, the airspeed that will provide balanced flight is approximately?
A: 45 and 120 kts.
*** Note – these airspeeds are based on mission design gross weight (19,462 lbs.), if the helicopter is lighter than MDW balanced flight is slower, heavier will require faster low-end speed – jettison fuel if feasible.
169. Q: Min. rotor brake pressure during a rotor brake engine start?
A: 450 PSI.
170. Q: When conducting a rotor brake start, if conditions allow (wind, deck motion, and FOD), how long should you wait after releasing the rotor brake prior to advancing the ENG POWER CONT levers?
A: One minute (to allow uniform lubrication and cooling of the high-speed shaft).
171. Q: Radalt range and display?
A: Radalt range is 0-8000′.
172. Q: Radalt hold altitude limit?
A: Not available above 1,500′
*** Note – the analog signal is required for AFCS and it is only provided by the RADALT up to 1500′ AGL.
173. Q: Auto approach altitude limit?
A: Max engagement altitude of 1,500′.
174. Q: Normal H60 hover attitude?
A: 4-5° nose up, 2-3° left wing down.
*** Note – the 2-3° left wing down is due to translating tendency. In low winds, when pilots slow the helicopter on instruments (i.e., instrument approach to a hover) there is a tendency to drift right (approximately 40-0 kts.). This is usually attributed to a level attitude in slow flight.
175. Q: Anti-ice reduces power available?
A: Up to 18%.