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SIGMA TANDEM SYSTEM OWNER’S MANUAL
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Section 4: Malfunctions & Emergencies • Chapter 2 - Emergencies & Refusal 11301 - 00.00.0000
Aircraft emergencies:
A. Below 4,000 Feet, engine out (500m)
B. Below 4,000 Feet, catastrophic airframe failure (500m)
C. 1,500 - 4,000 Feet>> (500m-1200m)
D. 4,000 + Feet>> (1200m & up)
PROBLEM: Aircraft emergency requiring exit at lower altitude than planned.
REACTION: Because of the steps required to deploy the main canopy correctly, it may be better to pull your reserve
ripcord in the event of a low-altitude emergency exit. Each Tandem Instructor should develop his own emergency exit
procedures designed for the aircraft he jumps from.
ANALYSIS: Due to the high freefall velocities that must be dealt with in Tandem, the Relative Workshop’s Tandem
canopies open a little slower than most square reserves. Otherwise, non-drogue Tandem terminal openings (160-180
MPH or 300kph) would be hard and uncomfortable. It is recommended therefore, that no emergency exits from
disabled aircraft be made below 4,000' AGL (500m). There are different recommended procedures for different altitudes.
A. Below 4,000' or 500m (aircraft engine out):
If the aircraft is stable and gliding, then stay with the aircraft. (This would be in the case of an engine out.) When the
aircraft has descended through 500 feet (150m), unhook your student and instruct them to put on a seat belt. Doing
this will facilitate the climb out after a bad landing.
B. Below 4,000' or 500m (catastrophic aircraft failure):
If the aircraft is on fire, or in a spin, or if the wing or some other large control surface has come off, get out and pull the
reserve ripcord. If death is assured by staying in the aircraft, then leave. Some chance at survival is better than none.
C. Below 4,000': (500m-1200m)
Exit the aircraft and pull the reserve ripcord.
D. Above 4,000': (above 1200m)
Exit the aircraft, deploy the drogue, pull drogue release handle at appropriate altitude. It is important to note here
that not all Tandem systems work the same way. On the Tandem Vector, the drogue will not fully inflate if the release
handle is pulled first. In fact, if the drogue release handle is pulled first, and then the drogue thrown, a 10 second main
canopy deployment can be expected. Not a good idea if you’re low. The correct procedure is to throw the drogue, wait
for it to inflate (1-2 seconds) and then immediately pull the drogue release handle. On the Sigma you can not release
the drogue before deploying it. The obvious advantage here? No mind games to play, no tricky scenarios that require
out-of-sequence handle pulling. You must always operate the handles in the same order each and every jump. No
matter what the circumstance, pull the operating handles in the same order.
Student refusal:
There are two different situations which may arise: 1) The student refuses while still in the aircraft, or; 2) The student
refuses once on the strut or outside of the aircraft. Follow the procedures below:
1. If the student verbally lets you know they do not want to jump then you must bring them back into the aircraft
unless the aircraft door is restrictive in a way that it would be dangerous to re-enter the aircraft(accidental deployment
of either parachute system).
2. Once back into the aircraft get the student comfortable and ask what the problem is. Do not assume that it is fright,
as it could be some physical discomfort.
3. Once you have established the problem decide on whether to make another attempt or not. If it seems to be a
psychological problem, re-assure the student of the ease of tasks and reliability of doing Tandem jumps. If they still do
not want to jump, descend with the aircraft, accompanying them to the ground.
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