Why does the maintainer carry out tests at different pressures between seats?
Some seats use equipment where damage can occur if higher pressures are used and, as such, it is important to use a lower pressure.
Why does the customer no longer carry out a load test on the seat raising actuator?
On the grounds of health and safety, it was deemed unsafe to request the customer to operate the seat whilst supporting a heavy weight.
How long does a seat training certificate last for?
This is currently being discussed and is likely to be three years.
Can the customer reuse old nuts whilst carrying out maintenance?
The old nuts should be removed and discarded and replaced with new items. There are, however, occasions where, as long as the locking properties remain serviceable, the nut can be reused to prevent any Aircraft on Ground situations.
How is the customer able to have the Martin-Baker manual changed if an error is discovered?
The customer should notify Martin-Baker by contacting our Technical Publications department – the address is usually at the front of the manual. If “Flight Safety” is affected, a Special Information Leaflet will be raised with immediate effect.
During scheduled maintenance, certain items used to be tested three times for each test - why don’t we do this anymore?
Over time, more reliability data has been available. This in turn has demonstrated that one test is enough and, also, constant operation of the units induces unnecessary wear.
Is there a specific format for the ejection seat, parachute and PSP bays to be set up?
There is no hard and fast format, however, Martin-Baker can advise the customer on a recommended facility set up.
What is the minimum length of a parachute packing table?
This depends on the type of parachute being maintained. The smaller parachutes should use at least a 40’ (12 metres) table and the larger parachutes should be 50’ (15 metres).
How often should “O” seals be changed?
Every scheduled maintenance, or if found to be suspect.
How does the customer identify spares?
The customer would refer to the relevant Martin-Baker technical manual and use the illustrated parts catalogue.