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2 OFF Removes power to MC2.
With WonW, both engines will spool up from ground idle to flight idle, if power is removed to MC1
(MC1 switch in 1 OFF).
2.18.1.2 Mission Data Entry. Mission data (date and flight number) can be manually loaded into the
mission computer for data recorder documentation. Data is entered by performing the following:
1. On the DDI - Press MENU, MUMI, then ID
2. On the UFCD - Enter Julian Date (DATE)
3. On the UFCD - Enter Flight Information (FLT)
Mission data can be manually loaded into the mission computer through the Memory Unit Mission
Initialization (MUMI) display or automatically loaded into the mission computer through the Data
Storage Set (DSS). The DSS consists of the Memory Unit (MU) and the Memory Unit Mount (MUM)
and provides memory storage for aircraft parameters, maintenance data, and avionics initialization
data. The DSS receives, stores, retrieves, and transmits data with the mission computer.
2.18.1.2.1 Mission Initialization. The MU provides the capability to load the following mission
initialization files: HARM, RADAR, MU ID, TACAN, WYPT/OAP, Combined Interrogator Transponder
(CIT), Sequential Steering (S/S), data link/ID, Overlay Controlled Stores (OCS), bomb wind
data, and ALR-67 display resets. The S/S file can have a 15 point sequence consisting of Geographic
Reference Points (GEOREF), GPS waypoints, and almanac data initialization files. Loading is done at
aircraft power up or when MUX communication is lost for more than 1 second and regained. If MUX
communication is not regained, a MU LOAD caution is displayed and an AV MUX error message is
displayed on the MUMI display. Manual loading may be done using the MUMI display.
2.18.1.2.2 MUMI - Memory Unit Mission Initialization Format. The MUMI format (see figure 2-40)
is accessible from the SUPT MENU and with WonW provides a visual indication of mission
initialization files loaded from the MU. If the MU directory indicates that no user files are present, the
MU ID displays NO IDENT. When the MU directory indicates a user file is present, MC 1 displays the
option. When the option is selected and the file is being read by MC 1, the option is boxed. If the read
is successful, the file is loaded and the option is unboxed. When a file is present and errors have
resulted from reading the file, the following occurs:
1. The MU ID displays NO IDENT.
2. The applicable load error is displayed (HARM, RDR, TCN, WYPT, S/S, OCS, GPS WYPT, GPS
ALM, ALR 67, WIND, DL13, or CIT).
A1-F18EA-NFM-000
I-2-127 ORIGINAL
3. MC 1 sends the appropriate maintenance code to the SDC.
4. If WonW, an MU LOAD caution is displayed on the DDI.
2.18.1.2.3 CRYPTO Switch. Setting the intercommunications amplifier control CRYPTO switch to
the ZERO position sends an erase signal to the MU. This causes the MU to erase all data stored
between predetermined memory locations.
2.18.1.2.4 Erase and Hold Data. The erase controller (EC) within MC 1 provides the capability to
automatically or manually erase, or inhibit erasing, of classified data contained in the MU, SMS, MC
1, and MC 2. When the EC determines classified mission initialization files have been read from the
MU, the EC classified data management system is activated. When activated, MC 1:
1. Displays the HOLD and ERASE options on the MUMI display.
2. Displays the CDATA advisory.
3. Sends applicable maintenance code(s) to the SDC.
Figure 2-40. MUMI Display
A1-F18EA-NFM-000
I-2-128 ORIGINAL
2.18.1.2.5 Automatic Erase. The MU, SMS, MC 1, and MC 2 automatically erase classified data
when all of the following criteria are met.
1. Airspeed is less than 80 KCAS.
2. Left and right engine THA less than 29°.
3. Transition from WoffW to WonW.
4. Pilot does not select erase inhibit (HOLD) or MC SUSPEND options.
NOTE
Automatic erase can be inhibited by selecting the HOLD pushbutton
option.
5. HOLD boxed with MU displayed prevents automatic erase of the MU.
6. HOLD boxed with ALL displayed prevents automatic erase of all units (MU, armament
computer, MC 1, and MC 2).
The EC commands the MU and the armament computer, then MC 1 and MC 2 to erase. The MC
ERASE IN XX SEC countdown timer starts (60 seconds). During the countdown, an MC SUSPEND
pushbutton option is displayed. The MC SUSPEND option may be toggled between boxed (selected)
and unboxed (deselected). When the timer reaches zero and the MU and armament computer have
finished erasing, the decision to continue erasing the remainder of MC 1 and MC 2 depends on the MC
SUSPEND option being deselected (unboxed); when deselected, the remaining erase of MC 2 and MC
1 is completed.
Automatic erase is also initiated by pilot ejection. The state of the HOLD options is ignored during
　
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