MH60T Trivia #276-300

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? 

275. Q: Droop stops are pulled out by centrifugal force above what Nr? 
A: 55-60% Nr. 

276. Q: With the PCL in lockout, what varies torque? 
A: The LDS. 

277. Q: With the backup pump in auto, what 4 conditions will turn the pump on? 
A: 1. No. 1 Res Low.  2. No. 1 HYD pump fail. 3. No. 2 HYD pump fail. 4. Tail rotor servo is inoperative (pressure loss in the No. 1 tail rotor servo). 

278. Q: What four criteria must be achieved prior to hydraulic leak test initiation? 
A: 1. AC power. 2. Back up pump in auto. 3. Weight on wheels. 4. All reservoirs full. 

279. Q: When in flight, how does weight off wheels affect backup pump? 
A: When airborne, the pump will activate (underlogic conditions) regardless of switch position. 

280. Q: If the backup pump power circuit breaker pops, what caution exists for the reset? 
A: AC power must be shut off first or the backup hydraulic control circuit breaker must be pulled first to protect the current limiters. 

281. Q: Damage to the current limiters results in? 
A: Loss of No. 1 Converter and all loads on the No. 1 AC Primary Bus. 

282. Q: #1 Primary Bus? 
A: Stab auto mode, DCU 2, GPPU 2, wipers, fuel dump, AFCS computer. 

283. Q: Cold weather abort start criteria: 
A: No TGT indication at 40 seconds, no oil pressure indication at 1 minute. 

284. Q: Cold weather oil pressure concerns: 
A: When oil pressure does indicate, it will rise rapidly.  It is normal to observe high oil pressure on start and may take up to 5 minutes to be green (100psi). Do not advance PCLs until oil pressure is in the green. 

285. Q: What protects the engine oil system from high oil pressure? 
A: A cold oil pressure relief valve opens at 120-180 PSI, dumping extra oil into the AGB case. 

286. Q: No.1 hydraulic system provides pressure to what? 
A: No. 1 Primary Servos and No. 1 tail rotor servo. 

287. Q: No. 2 hydraulic system provides pressure to what? 
A: No. 2 Primary Servos and Pilot Assist Servos. 

288. Q: The utility transfer module connects pressure to what? 
A: 1. No. 1 Transfer Module. 2. No. 2 Transfer Module. 3. Second Stage Tail Rotor Servo. 4. Rescue Hoist. 5. APU Accumulator. 

289. Q: The hydraulic leak test illuminates what 11 lights? 
A: 1. No. 1 Tail Rotor Servo. 2. SAS. 3. Boost Servo Off. 4. AFCS degraded. 5. No. 1 Res Low. 6. No. 2 Res Low. 7. Backup Res Low. 8. No. 2 Tail Rotor Servo. 9. Back Up Pump On and 2 Master Cautions. 

290. Q: Pilot Assist Servo Assembly consists of what? 
A: Pitch, yaw, collective boost. Pitch, roll, yaw, collective SAS. Pitch and roll trim. 

291. Q: Trim button on the AFCS control panel turns on and off what? 
A: Pitch, roll, collective and yaw trim. 

292. Q: SAS Boost button on the AFCS control panel turns on and off what? 
A: Pitch, yaw and collective boost. Pitch, roll, yaw and collective SAS. 

293. Q: Does securing the SAS/BOOST turn off trim? 
A: No, trim will remain on. 

294. Q: What trim will you have w/#2 RES LOW caution? 
A: Only collective and yaw. 

295. Q: AFCS is composed of what major subsystems? 
A: SAS, DAFCS Computer, Stabilator. 

296. Q: The 4 inputs to position the stabilator are? 
A: 1. Collective position. 2. Lateral acceleration. 3. Airspeed. 4. Pitch rate (CLAP). 

297. Q: The 5 functions of the stabilator are? 
A: 1. Streamlines downwash (eliminates nose up attitude at low speeds). 2. Collective coupling (minimizes pitch excursions due to collective inputs). 3. Angle of  incidence (adjusts for airspeed). 4. Lateral sideslip to pitch coupling (up and down – nose rt and lt). 5. Pitch rate feedback (dampens pitch excursions using pitch rate gyros) – SCALP. 

298. Q: What is the difference between SAS 1 and SAS 2 failure? 
A: If SAS 1 fails, the pilot must turn it off.  If SAS 2 fails, the DAFCS computer will automatically disengage the affected channel. 

299. Q: What 3 things does SAS 2 do that SAS 1 does not? 
A: 1. Hover coupler 2. Hover augmentation. 3. Gust alleviation. 

300. Q: Above 50 knots, the autopilot maintains what? 
A: Airspeed, heading, coordinated turn (pilot must press pedal and cyclic trim to center the ball).