X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Tue, 01 Dec 2009 06:31:04 -0500 Message-ID: X-Original-Return-Path: Received: from [66.7.230.2] (HELO JSFS01.johnstone.local) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTPS id 3996295 for lml@lancaironline.net; Mon, 30 Nov 2009 17:41:12 -0500 Received-SPF: none receiver=logan.com; client-ip=66.7.230.2; envelope-from=Dan.Kalmbach@johnstonesupply.com Received: from JSFS01.johnstone.local ([fe80::a088:e182:b674:83f2]) by JSFS01.johnstone.local ([fe80::a088:e182:b674:83f2%10]) with mapi; Mon, 30 Nov 2009 14:40:33 -0800 From: Dan Kalmbach X-Original-To: Lancair Mailing List X-Original-Date: Mon, 30 Nov 2009 14:40:31 -0800 Subject: RE: [LML] What could be causing this in-flight noise on my Legacy? Thread-Topic: [LML] What could be causing this in-flight noise on my Legacy? Thread-Index: AcpnnWiOFWmkhn83SEG1iBK5GtXiRgKcI8Cg X-Original-Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_FC122468DE4AAC4CAEBE2F06CC7B521A1391B69C0BJSFS01johnsto_" MIME-Version: 1.0 --_000_FC122468DE4AAC4CAEBE2F06CC7B521A1391B69C0BJSFS01johnsto_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Good afternoon Jay, what kind of prop are you using on your aircraft???? = Regards, Dan Kalmbach From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Jay = M. Sabot Sent: Tuesday, November 17, 2009 7:44 AM To: lml@johnstonesupply.com Subject: [LML] What could be causing this in-flight noise on my Legacy? Yesterday afternoon while flying Legacy N26XY (with about 17 hours to date)= , power and speed were reduced to explore the lower speed range of the airp= lane. Was at 4,500 MSL, smooth air. As the airplane decelerated thru 89 knots TAS, once or twice a sound was he= ard that can best be described as a door closing shut firmly. It sounded li= ke a landing gear door being slapped against the fuselage/cowling by the sl= ip stream. However, the gear was retracted. Opening the throttle and increasing speed eliminated the noise. The slappin= g sound, like a door closing firmly, did not reoccur. The noise occurred on= ly once or twice per event. I proceeded to repeat the flight conditions, an= d the same thing happened: As the airplane decelerated to below 90 knots wi= th the gear retracted and no flaps extended, just like the first time, the = noise was heard again two or three times over about 6 or 7 seconds. The thr= ottle was advanced and the noise did not repeat itself. I reduced the throttle and lowered the landing gear and allowed the airplan= e to decelerate again. Same thing happened with the gear extended, (no flap= s). A sound much like I imagine would be made if a gear door was swinging l= oose in the slipstream and occasionally hitting the wing skin or cowling. A= dvancing the throttle and retracting the gear was normal and the noise did = not reoccur. Returned for a normal landing. In the hangar, the gear and doors were examined only to find them all attac= hed firmly as they have been from the beginning. Nothing is loose, no sign = of anything striking the cowl or lower wing skins. Anyone had any similar experience? Would appreciate any commentary on the = situation and their findings in this regard. Thanks all. Jay M. Sabot --_000_FC122468DE4AAC4CAEBE2F06CC7B521A1391B69C0BJSFS01johnsto_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Good afternoon Jay, what kind of prop are you us= ing on your aircraft???? Regards, Dan Kalmbach

From: Lancair Maili= ng List [mailto:lml@lancaironline.net] On Behalf Of Jay M. Sabot
Sent: Tuesday, November 17, 2009 7:44 AM
To: lml@johnstonesupply.com
Subject: [LML] What could be causing this in-flight noise on my Lega= cy?

Yesterday afternoon while flying Legacy N26XY (with about 17 h= ours to date), power and speed were reduced to explore the lower speed range of = the airplane. Was at 4,500 MSL, smooth air.

As the airplane decelerated thru 89 knots TAS, once or twice a sound was heard that can best be described as a door closing shut firmly. I= t sounded like a landing gear door being slapped against the fuselage/cowling= by the slip stream. However, the gear was retracted.

Opening the throttle and increasing speed eliminated the noise= . The slapping sound, like a door closing firmly, did not reoccur. The noise occurred only once or twice per event. I proceeded to repeat the flight conditions, and the same thing happened: As the airplane decelerated to bel= ow 90 knots with the gear retracted and no flaps extended, just like the first time, the noise was heard again two or three times over about 6 or 7 second= s. The throttle was advanced and the noise did not repeat itself. <= /span>

I reduced the throttle and lowered the landing gear and allowe= d the airplane to decelerate again. Same thing happened with the gear extende= d, (no flaps). A sound much like I imagine would be made if a gear door was swinging loose in the slipstream and occasionally hitting the wing skin or cowling. Advancing the throttle and retracting the gear was normal and the noise did not reoccur.

Returned for a normal landing.

In the hangar, the gear and doors were examined only to find them all attac= hed firmly as they have been from the beginning. Nothing is loose, no sign of anything striking the cowl or lower wing skins.

Anyone had any similar experience? Would appreciate any commentary on= the situation and their findings in this regard.

Thanks all.

Jay M. Sabot

&nbs= p;

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