Karl,
I checked today Cessna 182 P Skyline=B4s 1976 POH and there on the page
4-5 they say (check list before take off): " doors and windows must be
closed and locked".
Otherwise there would be no reason for internal lock for both doors.
Just wonder that because Cessna=B4s open cannot open totally during
flight because of airflow.
Once it opened slightly during my flight because it was unlocked. That
was a passenger side. It was open a little and there was a cap one or
two inches. My passenger - my wife actually - did not like that
semi-open-door flight at all.
On the page 3-5 (emergency landing instructions) they say "unlock the
doors just before touching the ground (!)".
Raimo OH-XRT
----- Original Message -----
From: Karl Heindl
To: europa-list@matronics.com
Sent: Wednesday, November 18, 2009 5:12 PM
Subject: RE: Europa-List: Door locked inflight by pip-pins.
Raimo,
Yes, I accept your reasoning, and I am surprised to read that Cessnas
have internal locks. Their checklists probably say to not have them
locked on takeoff and landing. My PFA inspector would not have approved
the mod, although, my passenger door does have a pip pin lock for
locking on the ground only. Of course, if I were to end up inverted,
which is very likely in a trigear, in an otherwise successful emergency
landing, it wouldn't make any difference whether doors were locked or
not, as the doors couldn't be opened anyway, except with brute force. I
keep meaning to get one of those emergency exit hammers just for that
nightmare situation, and to reroute the fuel vent to the bottom of the
fuselage.
Regarding CO alarms, I can only recommend one which shows any presence
of the gas in ppm, and with a high pitched alarm when a safe figure
and/or duration is exceeded. You can get them in any hardware store.
I had a case not long ago, when a loose exhaust pipe caused some
carbon monoxide to leak into the cabin. On the other hand, it also
confirmed that fumes which sometimes enter via the flap slots on landing
did not register on the instrument.
Karl
-------------------------------------------------------------------------
-----
From: raimo.toivio@rwm.fi
To: europa-list@matronics.com
Subject: Europa-List: Door locked inflight by pip-pins.
Date: Wed, 18 Nov 2009 12:20:53 +0200
"Are you serious ? In an accident, how would a potential rescuer get
the doors open ?"
Karl,
I understand your point but I have thought it very carefully and I am
very serious and happy with my always locked doors when inflight (I have
pip-pins both side)!
The risks of the unlocked doors when inflight are heavier than the
risks of the pip-pin locked doors when crash landed.
Consider this:
1) An unthinking passenger can easily lift the lever and ask "what is
this?". Shit happens, really.
The pip pin prevents accidents like this - a pilot has more time to
react and say no no no.
The function of the pip-pin is in this case to be a retarder!
2) Pilots=B4s or co-pilot=B4s sleeve could easily lift the lever by
accident - pip pin prevents this.
The guard alone is good but not 100% guaranteed. The function of the
pip-pin is in this case to be a safety catch.
3) Passenger side=B4s pip-pin is a good, simple and effective door
lock when grounded.
The function of the pip-pin is in this case to be just a lock.
4) I have in my POH: before emergency landing remove door pip-pins.
5) In the case of emergency landing and the doors are still locked: do
you really think it is difficult to open the door? Just kick the window
and it is gone, surely! For "potential rescuer" it is not a problem at
all! It is the smallest worry in this case! Those pip-pins are clearly
visible and understandable.
BTW both of the C172=B4s doors are inflight lockable. I know some
people lock them and some do not. I locked them always when flying but
that was for personal comfort only. When locked the lever was levelled
and the armrest was usable. I am not sure what do they say in Cessnas
POH - my guess is "do open the door locks before landing".
Karl, do you accept my (serious) points?
Would you like to see the pick of my pip-pin equipped door lever
guards?
Raimo OH-XRT
lectric.com
/">www.buildersbooks.com
ebuilthelp.com
ww.matronics.com/contribution
>http://www.matronics.com/Navigator?Europa-List
ronics.com
|