B737200 From Malta, joined Feb 2005, 224 posts, RR: 2 Posted (6 years 11 months 3 weeks 4 days 18 hours ago) and read 9913 times:
My question is what is that "bar", I cannot think of a better word for it, at the back of the landing gear on the MD-80. I always wondered what it was, however recently I was asked what it was is by my computer teacher (who's into planes) and I decided I should ask around here seeing that a lot of you airplane technical whizzes hang out in the Tech/Ops forum.
I'll try link a picture but I've never tried that before so lets just hope it works.
I'm referring to that thing stuck to the nose gear.
I read something about a stone deflector on a nose gear shot, not sure if it was referring to that bar. Hopefully someone can tell me what it is for sure.
AirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 26 Reply 2, posted (6 years 11 months 3 weeks 4 days 18 hours ago) and read 9897 times:
Its a gravel deflector according to the AS Maintenance Manual.
A Safe Flight Begins With Quality Maintenance On The Ground.
B737200 From Malta, joined Feb 2005, 224 posts, RR: 2 Reply 4, posted (6 years 11 months 3 weeks 4 days 17 hours ago) and read 9874 times:
Thanks a million.
Just one more question, there also seems to be a "bar" on the rear undercarriage, this however seems to be shaped somewhat differently from the one on the nose; do these "bars" serve the same purpose as the one found on the nose gear?
Atlamt From United States of America, joined Sep 2001, 237 posts, RR: 3 Reply 5, posted (6 years 11 months 3 weeks 4 days 12 hours ago) and read 9798 times:
The front is a spray deflector as FredT said. The water coming off the nose wheels has a habit of going straight into the engines without it. The 727 used chined tires to overcome this. Chined tires are expensive and douglas opted for the spray deflector instead.
The rear deflector you see is for FOD. The 80's tend to kick up FOD into the engines. Part of our taxi procedures is to deploy flaps to 15 for FOD prevention. The deflector itself is metal and rubber and sits pretty close to the wheels about 6 inches off the ground.
Nonfirm From United States of America, joined Sep 2005, 434 posts, RR: 0 Reply 7, posted (6 years 11 months 3 weeks 4 days 11 hours ago) and read 9777 times:
The one installed on the nlg is the water or spray deflector and the one on the mlg is the gravel deflector.
SlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 71 Reply 8, posted (6 years 11 months 3 weeks 4 days 11 hours ago) and read 9776 times:
Quoting DeltaGuy (Reply 6): That nose splash guard is only 2"-3" inches off the ground, hence you can't put a chock behind the nose wheel...have to put em both on the mains.
It also required a new edition of the DC-9 towbar. It is an inch or so wider than the nosegear lugs without the spray deflector. Most newer models can reach in to catch the lugs on DC-9s but the older one cannot spread far enough for an MD-80.
Happiness is not seeing another trite Ste. Maarten photo all week long.
2H4 From United States of America, joined Oct 2004, 8950 posts, RR: 62 Reply 9, posted (6 years 11 months 3 weeks 4 days 10 hours ago) and read 9770 times:
DeltaGuy From , joined Dec 1969, posts, RR: Reply 10, posted (6 years 11 months 3 weeks 4 days 8 hours ago) and read 9742 times:
Quoting SlamClick (Reply 8): It also required a new edition of the DC-9 towbar. It is an inch or so wider than the nosegear lugs without the spray deflector. Most newer models can reach in to catch the lugs on DC-9s but the older one cannot spread far enough for an MD-80.
Yessir, sure does. I remember working the ramp back in the day, andh aving to have two different towbars for such purposes...even though both jets *seem* to be identical in that facet.
FlyDeltaJets From United States of America, joined Feb 2006, 1623 posts, RR: 3 Reply 12, posted (6 years 11 months 3 weeks 2 days 8 hours ago) and read 9570 times:
Quoting DeltaGuy (Reply 6): That nose splash guard is only 2"-3" inches off the ground, hence you can't put a chock behind the nose wheel...have to put em both on the mains.
AirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 26 Reply 13, posted (6 years 11 months 1 week 4 days 13 hours ago) and read 9291 times:
Quoting B737200 (Reply 4): there also seems to be a "bar" on the rear undercarriage, this however seems to be shaped somewhat differently from the one on the nose; do these "bars" serve the same purpose as the one found on the nose gear?
Yes they do, but these two 'bars' keep the rocks and other FOD from entering the engines.
A Safe Flight Begins With Quality Maintenance On The Ground.
Avioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11 Reply 15, posted (6 years 11 months 1 week 3 days 22 hours ago) and read 9200 times:
In a study done by a university specializing in aviation studies a couple of years ago, every broken spray deflector, submitted for examination, had yellow paint on the bottom.
Hence, NEVER chock the nose wheels on an aircraft so equipped.
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
FlyDeltaJets From United States of America, joined Feb 2006, 1623 posts, RR: 3 Reply 16, posted (6 years 11 months 1 week 1 day 17 hours ago) and read 9067 times:
Quoting HAWK21M (Reply 14): Are you saying the NLG wheels are never chocked.
The nose gear is alos chocked but only the front on MD88/90 a/c
AirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 26 Reply 17, posted (6 years 11 months 1 week 13 hours ago) and read 8971 times:
Quoting Avioniker (Reply 15): Hence, NEVER chock the nose wheels on an aircraft so equipped.
Same with 732's with gravel deflectors.
A Safe Flight Begins With Quality Maintenance On The Ground.
N8076U From United States of America, joined Jun 2006, 425 posts, RR: 10 Reply 18, posted (6 years 11 months 1 week 12 hours ago) and read 8960 times:
Not sure about other airlines, but at UAL according to the ops manual, you could only chock the nose if the aircraft would be moving in a couple hours (honestly, I don't remember the exact number, but I believe it was 2 or 4 hours), but it was preferrable to chock the mains and to hook up the towbar/tug if possible. If the aircraft would not be moving within the specified time, you had to chock the mains anyways. Unfortunately, it's been a few years since I've had the pleasure, and I am going strictly by memory.
The DC-10-30's we had always got the mains chocked, as the brakes had to be released in order to fuel/load the aircraft, due to the center main gear being tilted differently than the mains.
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Same with 732's with gravel deflectors.
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