Re: JT-8D Hush Kits

From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
Date:         17 Aug 95 04:58:54 
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>2. JT-8D's are installed on B737s, DC8-?, MD80s. ... and ??

727, 737, DC-9, Dassault-Breguet Mercure, and a few Caravelles (though
most had RR Avons).  The MD-80 series uses the much-upgraded JT8D-200
series.  The DC-8 did not use the JT8D; it used the JT3D, JT4D, Rolls-
Royce Conway.  (The DC-8 Super 70 series is a re-engined version with
CFM56 engines).

>4. MD80s have been banned from John Wayne (Orange County) and in Switzerland
>because of noise issues.. true?

Apparently not true for SNA (Orange County), at least -- I just checked
a recent OAG and see both TWA and Alaska flying there with MD-80s.  All
of American's flights appear to be 757s, though I'm pretty sure I've
seen them use MD-80s there in the past.

>7. Nordam successfully meets Stage 3 noise regulations ????

I assume so -- there wouldn't be much market for them if they didn't
meet Stage 3 requirements.

>8. Nordam's hush kit was not to blame in the recent grounding of B737s
>in New Zealand.


>10. What is the market for hush kits. Is it true that American is furious
>with McDonnell Douglas because of all the noise MD80s that they are saddled
>with (how many?).

American has 260 MD-80s, mostly MD-82s with a few MD-83s.  They are
already Stage 3 compliant so I can't imagine there being a market for
hush kits for them.

For older DC-9s, there's probably a pretty good market for hush kits.
Northwest alone will be buying on the order of 100 shipsets.  USAir
has a large DC-9 fleet, too, and all those ValuJet DC-9s will need
to be muzzled.  That's just in the US.

There are large fleets of 727s and 737-200s that will also need to
be quieted down or replaced.  There's not much time left to replace
them, so many will probably end up with hush kits too.

Karl Swartz	|Home
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