Re: I fly the J-31!

[Sydney Hoeltzli]

Capt. Doug wrote:
> I had the opportunity to fly a Jetstream 31 recently.

Hi Doug, enjoyed reading this. One question:

> Along the way, the TCAS alarm went off. That's one of those things that sits
> you up right away with wide open eyes searching frantically for the other
> plane. Apparently, the other plane was well below us but without Mode C. The
> TCAS unit doesn't know the altitude, so we get a warning. If the other plane
> had an operating Mode C, the TCAS unit would have determined there was no
> threat.

How common is this? Do planes in the flight levels commonly get TCAS
warnings about planes w/out Mode C who are well below them? Is there
any distance below you where TCAS will be able to determine that the
other plane isn't a threat sans Mode C?

IOW if a plane w/out mode C is at 9,500 will you get a TCAS in the
flight levels?

Thanks,
Sydney

[Ron Natalie]

"Capt. Doug" > wrote in message ...
> I had the opportunity to fly a Jetstream 31 recently. The -31 is a 19
> passenger pressurized turboprop commuter with a MGTOW of 14,450 pounds. It
> was built by British Aerospace with Garrett engines. Most have a belly pod
> added for additional cargo space.

Nice article. I think you had the best seat in the house. The passenger
seats are horrendously awful in the 31, that and I can keep tripping over
the damn spar carrythrough. I hate them damn propstreams. I hear
the 41 is better, I'll find out next week.

> Over-all, I enjoyed flying the -31. It doesn't have the baggage space that
> comparable planes have, even with the belly pod, but operators I know who
> use -31s are happy with them.

At least it's not like the Fairchild/Swearingen Metro which doesn't have any
in cabin storage either. I couldn't understand them when they wanted to
check my briefcase until I found there was no way I could stow it under
the seat.

[Capt. Doug]

>Sydney Hoeltzli wrote in message > IOW if a plane w/out mode C is at 9,500
will >you get a TCAS in the flight levels?

Yes, you will get a warning. It happens quite often too. We had one today,
but already had a visual on the target. Another airliner apparently wasn't
so lucky. They received a warning and had to comply with the TCAS's commands
for a deviation (which can be quite upsetting to the pax and cabin
articles). Then the crew is required to inform ATC of the deviation. In this
instance, we listened on the frequency as the controller then confirmed that
the target's Mode C was inop and the target was never a real threat.

D.

[Michelle P]

Doug,

Gee I am jealous. I only get to taxi J-41s and CRJs around Dulles
Airport. I get to work on them too. I would rather be flying them.....
Maybe someday.

Michelle

Capt. Doug wrote:

>I had the opportunity to fly a Jetstream 31 recently. The -31 is a 19
>passenger pressurized turboprop commuter with a MGTOW of 14,450 pounds. It
>was built by British Aerospace with Garrett engines. Most have a belly pod
>added for additional cargo space.
>
>In preparation, I read the limitations and reviewed the memory items for
>emergencies. Being written by the British, the AFM had some words and terms
>that seem strange. 'Torches' actually means flashlights. I sat in the
>cockpit for about 20 minutes to learn where all the switches and knobs were.
>The only thing that confounded me was the where-abouts of the control lock.
>I consulted the captain who pointed to a little lever near the bottom of the
>center pedestal.
>
>Engine starting is easy. Push the start button until 10% RPM, then just
>monitor the guages. The start relays cut out at 60% RPM and the engine
>stabilizes at 71%RPM. After both engines were started, the generators are
>brought online and the air conditioning is cranked up. The windshield heat
>is turned on even though the OAT is 30*C. This is done for birdstrike
>protection. Cold glass is more brittle. Garrett engines are not known for
>being quiet, but most of the noise stays outside the cockpit.
>
>Taxiing was different. The first thing I found out is that the brakes are
>powerful and touchy. Just a slight touch of brake would send the plane
>lurching to one side or the other. I stopped using the brakes and relied on
>reverse thrust to stop. As a passenger on J-31s, I had noticed that the
>pilots always had a hard time following the taxi lines with precision. Now I
>know why. The nose wheel steering has a lot of slop in it. One has to
>average out the slop to taxi straight. Flaps are set at 10* for normal
>take-off. Rotation would be at 107 KIAS and Vy was 122 KIAS.
>
>For take-off, my senses were heightened more than usual because the plane
>had been sitting for 2 years. The take-off was routine however. I climbed
>out at 160KIAS so that I would have a better look over the nose for traffic.
>I've heard that the Jetstream has some funky yawing because of the short
>coupled vertical stabilizer, but I didn't find it to be any worse than other
>planes in this class. As we climbed, our true airspeed stayed the same but
>our fuel flow decreased. We climbed to FL250 so that we could squeeze 4.5
>hours out of the fuel tanks. Leveled off at FL250, we were burning a measly
>570 pounds/hour with 230KTAS and an 8000' foot cabin. The controls were a
>little sluggish in the thin air.
>
>Along the way, the TCAS alarm went off. That's one of those things that sits
>you up right away with wide open eyes searching frantically for the other
>plane. Apparently, the other plane was well below us but without Mode C. The
>TCAS unit doesn't know the altitude, so we get a warning. If the other plane
>had an operating Mode C, the TCAS unit would have determined there was no
>threat.
>
>At FL250, the plane flies at about 4* nose up. We picked up some ice and
>lost 15 knots. I'm guessing it's because the belly and belly pod picked up
>quite a bit of ice due to the nose up attitude.
>
>Just before descent, the left engine started fluctuating wildly. I shut off
>the engine computers and it stabilized. We flew a practice ILS approach to
>check the avionics. The -31 is stable and airspeed is easily kept at 120
>knots. The flight director makes flying the approach even easier.
>
>The stall warning sounded just as the mains hit the runway. I pulled the
>power levers back to the flight idle gates and felt the enormous drag of the
>propellers as they flatten out. Then the nose started to drop down. And drop
>down some more. And then some more. I had serious concerns that the nose
>gear wasn't right. Then the nose dropped some more. Finally the nose wheels
>touched down. The -31 normally sits nose low and I'm not used to it. It got
>my pulse rate up for sure. Reverse thrust is very effective down to about 40
>knots. Below 40 knots, I started the herky-jerky with the touchy brakes and
>ponderous steering tiller.
>
>Over-all, I enjoyed flying the -31. It doesn't have the baggage space that
>comparable planes have, even with the belly pod, but operators I know who
>use -31s are happy with them.
>
>D.
>
>
>
>

--

Michelle P CP-ASMEL-IA, and AMT-A&P

"Elisabeth" a Maule M-7-235B (no two are alike)

Volunteer Pilot, AirLifeLine

Volunteer Builder, Habitat for Humanity

[Ben Jackson]

In article >,
Michelle P > wrote:
>
>Gee I am jealous. I only get to taxi J-41s and CRJs around Dulles
>Airport. I get to work on them too. I would rather be flying them.....
>Maybe someday.

Do you need any kind of FAA cert to do that? In a movement area vs
non-movement area? It never occured to me that non-pilots were taxiing
planes, but I guess it's not that surprising for maintenance...

--
Ben Jackson
>
http://www.ben.com/

[Michelle P]

Ben,

No the FAA does not require any certification because we are not
operating the aircraft for the purpose of air navigation.
We do have a company mandated 18 hour training course per aircraft type
before they will let you be "PIC".
The instructor looked at me and skipped the airport diagrams and radio
phraseology because I already have my Pilots license.

Michelle

Ben Jackson wrote:

>In article >,
>Michelle P > wrote:
>
>
>>Gee I am jealous. I only get to taxi J-41s and CRJs around Dulles
>>Airport. I get to work on them too. I would rather be flying them.....
>>Maybe someday.
>>
>>
>
>Do you need any kind of FAA cert to do that? In a movement area vs
>non-movement area? It never occured to me that non-pilots were taxiing
>planes, but I guess it's not that surprising for maintenance...
>
>
>

--

Michelle P CP-ASMEL-IA, and AMT-A&P

"Elisabeth" a Maule M-7-235B (no two are alike)

Volunteer Pilot, AirLifeLine

Volunteer Builder, Habitat for Humanity

[Robert Moore]

Michelle P wrote
> We do have a company mandated 18 hour training course per
> aircraft type before they will let you be "PIC".

That would be "Person-in-Cockpit"...right?

Bob Moore

[Ron Natalie]

"Michelle P" > wrote in message ...
> Ben,
>
> No the FAA does not require any certification because we are not
> operating the aircraft for the purpose of air navigation.
> We do have a company mandated 18 hour training course per aircraft type
> before they will let you be "PIC".

Or TIC...taxier in command?

[Ron Natalie]

"Ben Jackson" > wrote in message news:sW7Pa.19537$OZ2.3738@rwcrnsc54...
> In article >,
> Michelle P > wrote:
> >
> >Gee I am jealous. I only get to taxi J-41s and CRJs around Dulles
> >Airport. I get to work on them too. I would rather be flying them.....
> >Maybe someday.
>
> Do you need any kind of FAA cert to do that? In a movement area vs
> non-movement area? It never occured to me that non-pilots were taxiing
> planes, but I guess it's not that surprising for maintenance...
>
Michelle is a pilot, just no Propstream rating. She flies a Maule with a big
assed engine.

[Capt. Doug]

>Ron Natalie wrote in message > Can TCAS issue an RA with only a mode A
return >from the other aircraft?

I believe so, but can't find anything in my library to substantiate this.
Either way, our Ops manual allows for deviations if a threat to safety is
perceived.

D.

[Ron Natalie]

"Capt. Doug" > wrote in message ...
> >Ron Natalie wrote in message > Can TCAS issue an RA with only a mode A
> return >from the other aircraft?
>
> I believe so, but can't find anything in my library to substantiate this.
> Either way, our Ops manual allows for deviations if a threat to safety is
> perceived.
>
What does it tell you to do? Can it figure out altitude without mode C (I guess
it can do the samething that it does for azimuth).

[Garner Miller]

In article >, Ron
Natalie > wrote:

> Can TCAS issue an RA with only a mode A return from the other aircraft?

No, it can't. It can and will issue a Traffic Advisory if the target
is a possible threat, but since all an RA can do is guide you
vertically, it's not possible for it to issue an RA without altitude
information on the other aircraft.

--
Garner R. Miller
ATP/CFII/MEI
Manchester, CT =USA=

[Michelle P]

Bob,

That would be the person in the left seat (PILS) at the tiller....
Rudders do not work for steering the J-41 at low speed.

Michelle

Robert Moore wrote:

>Michelle P wrote
>
>
>>We do have a company mandated 18 hour training course per
>>aircraft type before they will let you be "PIC".
>>
>>
>
>That would be "Person-in-Cockpit"...right?
>
>Bob Moore
>
>

--

Michelle P CP-ASMEL-IA, and AMT-A&P

"Elisabeth" a Maule M-7-235B (no two are alike)

Volunteer Pilot, AirLifeLine

Volunteer Builder, Habitat for Humanity