ILUV767 From United States of America, joined May 2000, 3140 posts, RR: 10 Posted (11 years 4 months 4 hours ago) and read 1705 times:
Hello everyone,
I've made some recient 737 trips and evertime that I sit twards the front of teh plane, on take off there is this high pitched squeal. After take off its there. During our climb its on and off. After about 10 minutes it goes away.
-Does anybody know what sound i'm talking about
-Does anybody know what this sound is?
Avmechgirl From , joined Dec 1969, posts, RR: Reply 2, posted (11 years 4 months 2 hours ago) and read 1574 times:
I've never been in a 737 but I think and I could be wrong, it might be the engines and the compressors with the air going through.
I'm sure someone can shed some more light on this subject!
DL_Mech From United States of America, joined Feb 2000, 1591 posts, RR: 11 Reply 3, posted (11 years 3 months 4 weeks 1 day 21 hours ago) and read 1557 times:
Sometimes the cabin doors can be quite leaky and will make a squealing sound until the door seals have sufficient differential pressure to seal them....
R I P 474218 / GLHCARL - Riding up to Heaven on an L-1011
CdfMXTech From United States of America, joined Jul 2000, 1335 posts, RR: 34 Reply 4, posted (11 years 3 months 4 weeks 1 day 20 hours ago) and read 1559 times:
Ummmm....What kindo of the B737 are u talking about??
B737-100/200 - Jt8d engines
B737-300/400/500 - Cfm56-3's
B737-Next Generation - Cfm56-7's
I'd be willing to guess you were the B737-100/200. I've never heard the other 737s squeal during takeoff.
KonaB777 From , joined Dec 1969, posts, RR: Reply 5, posted (11 years 3 months 4 weeks 1 day 15 hours ago) and read 1531 times:
Must be leaking pressure around all those old doors... Too bad they don't have plug doors like the A320 does. On the -20, when you close the door, you are sure it has sealed, you don't have to wait until the door starts rattling on climbout to find out it hasn't sealed.
ILUV767 From United States of America, joined May 2000, 3140 posts, RR: 10 Reply 6, posted (11 years 3 months 4 weeks 1 day 15 hours ago) and read 1532 times:
Its not the doors. I've been by the doors and this sound is much much louder.
Kona: 737 doors are true plugs. They are bigger than the whole that they fit through. By opening the door, the size changes which allows it to swing outward.
CdfMXTech: I've heard it on 737-300s and 737-500s. I've never flown on a -400 or an NG. Its been years since I last was on a -200.
CdfMXTech From United States of America, joined Jul 2000, 1335 posts, RR: 34 Reply 7, posted (11 years 3 months 4 weeks 1 day 13 hours ago) and read 1514 times:
ILUV767 From United States of America, joined May 2000, 3140 posts, RR: 10 Reply 8, posted (11 years 3 months 4 weeks 1 day 13 hours ago) and read 1513 times:
The past few trips where I've heard this sound was up front. I've been in row 1, row 2, and row 3. Other than that I've been in the back row. The sound is not there in the back.
Also, each time that I've noticed the sound I've been on the right side of the plane. Once I sat in 2A and I didn't recall hearing that sound.
Zartan From , joined Dec 1969, posts, RR: Reply 9, posted (11 years 3 months 4 weeks 1 day 13 hours ago) and read 1516 times:
high pitched squealing sounds in aircraft are often due to air being squeezed through the passenger vents (i.e. those things that blow air on your face). Often someone's vent is adjusted to only leave a tiny hole which causes the air to whistle through. as air pressure varies throughout the flight, throttling back the engines after initial climb may have turned the whistling off.
I sat through a 2 hour flight once with an incredible high pitched whistle that was driving me absolutely nuts and was due to this (as i noticed when the woman in front of me reached up to change the vent and the sound ended, to all of our relief).
King767 From , joined Dec 1969, posts, RR: Reply 10, posted (11 years 3 months 4 weeks 1 day 11 hours ago) and read 1497 times:
Kona,
You look for the most insignificant things to bring against the 737. You make no sense when you make statements like
<<"On the -20, when you close the door, you are sure it has sealed, you don't have to wait until the door starts rattling on climbout to find out it hasn't sealed.">>
That shows a total lack of knowledge. Actually Kona, the 737NG has new redesigned doors, and I have never heard of a 737 or any airliner for that matter finding out they havent closed their doors completely inflight.
-Tom
IndianGuy From , joined Dec 1969, posts, RR: Reply 11, posted (11 years 3 months 4 weeks 15 hours ago) and read 1462 times:
Ok i think i get what ILUV767 is talking about.
I have heard a funny rythmic "bell" like sound on the 3 or so 737-400 flights i have been on. This sound usually happened when there was a noticeable change in engine power.
37KEEPER From , joined Dec 1969, posts, RR: Reply 12, posted (11 years 3 months 4 weeks 15 hours ago) and read 1461 times:
JUST THROWING THIS OUT FOR CONSUMPTION BUT HAVE HAD GRIPES FROM FLIGHT ATTENDANTS AND DEADHEAD CREWS SAYING THEY HEARD A SQUEAL "NOT THE R1 OR L1 DOOR TYPE" .THROUGH PROCESS OF ELIMINATION FOUND PROBLEM IN THE GALLEY OVERBOARD VENT ASSEMBLY THAT LEADS TO THE VENT JUST OVER AND AFT OF THE L1 DOOR. WE CHANGED OUT THE DUCT ASSLY AND GRIPE DID NOT REPEAT. JUST LIKE ANY OTHER "SOUNDS LIKE" WRITEUP VERY HARD TO GET THE FULL PICTURE IF YOU AREN'T THERE TO EXPERIENCE IT.
37KEEPER From , joined Dec 1969, posts, RR: Reply 13, posted (11 years 3 months 3 weeks 6 days 12 hours ago) and read 1417 times:
SORRY FOLKS JUST READ MY REPLY BACK AND REALIZED THAT THE OVERBOARD VENT FOR THE GALLEY IS ABOVE THE R1 DOOR. REMEMBER I'M JUST A MECHANIC/TECHNICIAN---HARD TO KEEP THAT RIGHT FROM LEFT THING STRAIGHT!
Accidentally From United States of America, joined Dec 2000, 629 posts, RR: 0 Reply 14, posted (11 years 3 months 3 weeks 5 days 22 hours ago) and read 1404 times:
Fanoftristars From United States of America, joined Jul 2000, 1549 posts, RR: 6 Reply 15, posted (11 years 3 months 3 weeks 5 days 4 hours ago) and read 1372 times:
KonaB777:
Yeah, the doors rattle in those Damn 73s. Now that's what I call horse sh*t!
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