WARNING AND EMERGENCY SERVICES SYSTEM
LEADING PARTICULARS
| Manufacturer: | Page |
| Connection: | UK-AN / MIL-C-5015, various |
DESCRIPTION
The warning and emergency circuits are organised into two groups depending on their functional importance. The groups are named:
- Standard warning system (interfaced to the fire protection system)
- Auxiliary warning system
Both systems have their own display panel to annunciate issues by illuminating small text captioned windows, as follows:
- Standard warning panel (S.W.P.), red indicators, on panel A4
- Auxiliary warning panel (A.W.P.), orange indicators, on panel A1
STANDARD WARNING SYSTEM
The standard warning system observes critical parameters and conditions, when an issue occurs the relevant caption of the SWP is illuminated red.
In addition to the S.W.P., two "attention getter" lamps are installed, which flash red when a standard warning event occurs. Additionally an audible warning alarm is also mixed in with the intercom system.
The activation of the attention getter lamps and audible warning of an SWP caption illumination is latched on, meaning that the fault condition may go away and caption extinguish, but the flashing attention lamps and audible warning persist until the "C" cancel button is pressed. If the cancel button is pressed while the fault condition is still present, the attention getters and audible warning are cancelled, but the window stays illuminated.
An audio warning mute switch marked "M" fitted to panel A1 reduces the volume of the audio warning when pulled out.
A lamp test button is fitted to illuminate all SWP captions. Pressing this also triggers the attention getters and audible warning, due to them being triggered by an SWP caption being illuminated.
| Caption | Warning Description |
|---|---|
| OXY 1 | Oxygen pressure low (pupil) |
| OXY 2 | Oxygen pressure low (instructor) |
| GEN | Generator failure |
| HYD | Hydraulic failure of both systems |
| TRIM | Auto trim circuit failure |
| CPR | Cabin pressure failure |
| RHT 1 | No. 1 jet pipe reheat area fire |
| RHT 2 | No. 2 jet pipe reheat area fire |
| FIRE 1 | No. 1 engine bay fire |
| FIRE 2 | No. 2 engine bay fire |
AUXILIARY WARNING SYSTEM
The auxiliary warning system observes less critical parameters and conditions, when an issue occurs the relevant caption of the SWP is illuminated orange.
Unlike the SWP, when an AWP caption is illuminated it is not latched, so when a fault condition clears, the caption lamp will extinguish on its own with no need for a cancel button.
Illumination of AWP captions also does not initiate the attention getter lamps or the audible warning.
A lamp test button is fitted to illuminate all SWP captions.
| Caption | Warning Description |
|---|---|
| CAN | Canopy unlocked |
| ICE | Ice detected |
| GEN | Main DC generator failure |
| FUEL 1 | Fuel pressure low, No. 1 engine |
| FUEL 2 | Fuel pressure low, No. 2 engine |
| OIL 1 | Oil pressure low, No. 1 engine |
| OIL 2 | Oil pressure low, No. 2 engine |
| AC | AC generator power failure |
| TURB | Turbine stall |
| HYD 1 | Hydraulic pressure failure, No. 1 system |
| HYD 2 | Hydraulic pressure failure, No. 2 system |
| TTC 1 | Reheat temperature high, No. 1 jet pipe |
| TTC 2 | Reheat temperature high, No. 2 jet pipe |
| PUMP P | Fuel transfer pump pressure low (port) |
| PUMP S | Fuel transfer pump pressure low (stbd.) |
REFERENCES
F Mk. 3, T Mk. 5 and F Mk. 6 aircrew manual:
A.P.101B-1003, 5 & 6A, Part 1, Chapter 9, A.L.2, Nov. 1984, Warning Systems and Lighting
T Mk.5 electrical "Vol. 1":
A.P.101B-1005-1B, Sect.6, Chap.12, A.L.61, Nov. 1973 - Warning and Emergency Services
T Mk. 5 wiring diagrams:
AP101B-1005-10, Sheet 83, A.L.3, Nov 1981, Warning and Emergency - Standard Warning System
AP101B-1005-10, Sheet 84, A.L.3, Nov 1981, Warning and Emergency - Auxiliary Warning System
AP101B-1005-10, Sheet 85, A.L.3, Nov 1981, Warning and Emergency - Fire Protection System