Contact Qs Flashcards
The 701D engine on the UH-60M has the DECs or EDECUs that replace the ECUs found in the UH-60A. The DECs or EDECUs improve transient droop compensation how? Explain how and when the DEC limits TGT.
The DEC/EDECU receives signals from Nr and collective signals, these are compared with Np and TRQ signals. A priority signal is then processed to quickly trim the Torque motor in the HMU to compensate for the demand.
The DEC commands the HMU to limit fuel when TGT reaches its limiting value. Dual engine TGT 879 +/- 9 Contingency TGT 903 +/- 10
Explain when the EDECU limits TGT
Dual engine TGT 879 +/- 9 Contingency TGT 903 +/- 10 On engines with the EDECU installed, the TGT will bypass the 10 minute limiter and limit at the 2.5 minute contingency power setting when any of the following conditions are met: NP drops below 96%; greater than 3% droop between reference NP and actual NP; greater than 5% per second NP droop rate exists and NP less than or equal to NP reference speed. Unlike the DEC, the EDECU is not dependent on the other engine’s Q being less than 50%
What are DEC/EDECU fault codes? How are DEC/EDECU fault codes displayed?
If a failure occurs on a selected input signal, the failed component or related circuit will be identified by a pre-selected fault code displayed as a Q code. They are displayed at a rate of 4 seconds on and 2 seconds off during startup, and 30 seconds after both engines are shutdown with ac power applied.
Discuss the controls and functions of the digital ICS Panel.
a. ICS-b. VOX- c. HOT MIC- d. CALL- e. RMT- f. BU- g. ICU status line
Default mode enabled after initialization of the ICS is complete.
Provides for hands-off and foot-off voice activated keying.
Provides for constant keying of the ICS interphone.
Overrides all other interphone communications at all operator stations, except for warnings and alerts.
Enables RAD SEL switch on th collective sticks for radio and selections.
Provides both pilots the capability to bypass the ICS digital bus and function in a degraded analog mode (no HOT MIC or VOX.
Illumination indicates that the digital link between that ICS panel and the ICU has been broken.
The ICS panel on the UH-60M features a VOX feature, what are the procedures for adjusting the VOX sensitivity?
If VOX sensitivity control is desired, press the VOX mode pushbutton for 2 seconds; VOX light flashes; adjust VOX sensitivity with the MVOL control as desired. After three seconds of no adjustments on the MVOL control, the VOX indicator will stop flashing and returns to the default settin
What is the CAUTION associated with inserting the PCMCIA cards into the DTS?
Do not force PCMCIA cards into the DTS slot. Damage to the Data Transfer Unit (DTU) or PCMCIA card may occur. PCMCIA cards can only be inserted into the DTU with the “INSERT “ label facing aft.
Identify the following Master Warning Panel warnings and what causes each to appear? What is the CAUTION with warning panel A?
When pressing the MASTER CAUTION PRESS TO RESET switch (A), do not press the #1 ENG OUT, #2 ENG OUT, FIRE, or LOW ROTOR R.P.M segment lights.
If you experience IIMC are you required to inform the commander?
Yes (1-212 SOP, 6-19 a. 2)
When are operator and crew member checklists required to be used? When may they not be used? Within the UH-60M -10, what do the words shall, should and may indicate?
Operator and crewmember checklist will be used for preflight through before leaving aircraft checks.
While airborne, when time not does permit use of the checklist or when its use would cause a safety hazard, required checks may be accomplished from memory. AR 95-1, Para. 2-5
Shall = Mandatory, Should = Nonmandatory but preferred method, May = an acceptable method
