Re: AA BDL MD-80 Incident

From:         rj.mills@pti-us.com (Dick Mills)
Organization: Power Technologies Inc.
Date:         04 Dec 95 01:14:59 
References:   1 2
View raw article
  or MIME structure

brianmccar@aol.com (BrianMcCar) wrote:
>possibly due to the disruption in control tower routine.  Since there was
>one hell of a front passing through, the barometric pressure must have
>been changing significantly.

Here's some information I got courtesy of
kbrews@ROSSBY.METR.uoknor.edu (Keith Brewster)

   Anyone following the reports on the MD80 incident at Windsor Locks?
   If I interpret an AP wire report correctly, NTSB is saying the
   altimeter setting given was 29.51, while at landing it was 29.35
   and seemed to be leaning against wind shear as a factor.

   Looking at the SAO's...  ..tough night for flight...

   BDL SA 0250 22 SCT M27 OVC 6R-F 025/61/57/1624G30/960/ 8/5/// 57052 6005//
    PK WND 1639/32=
   BDL SA 0350 22 SCT M27 OVC 10R- 992/62/57/1626G35/951/ PK WND 1638/35 PRESFR=
   BDL SA 0452 22 SCT M28 OVC 5R- 963/61/57/1628G40/942/ 400640035/ PK WND
    1642/18 PRESFR=
   BDL SA 0551 17 SCT M28 OVC 3R 938/61/58/1725G40/935/ PK WND 1743/18 PRESFR/
    8/5/// 55086 6040/ 10063 20060=
   BDL SP 0617 M20 OVC 2R+ 1630G36/930/ PRESFR=
   BDL RS 0651 M20 OVC 3R+ 903/62/59/1728G43/925/ PRESFR=

   The winds aloft (hgt in m MSL, speed in m/s (~kts/2)),
   this is from Long Island, 00z.  Note that shows 70kts at
   about 1000 ft msl.
   OKX
       PRES     HGHT     TMPC     DWPC     DRCT     SPED
      1008.00    20.00    16.00    15.00   160.00     9.00
      1005.00    46.56    16.20    13.70   160.00    11.24
      1000.00    91.00    16.00    14.00   160.00    15.00
       975.14   305.00    14.58    13.47   160.00    34.00
       972.00   332.43    14.40    13.40   160.45    33.82
       940.55   610.00    13.26    10.77   165.00    32.00
       912.00   870.13    12.20     8.30   177.82    32.00
       907.23   914.00    11.94     8.25   180.00    32.00
       874.72  1219.00    10.17     7.86   180.00    31.00

   I believe the time of landing was 12:57 EST, 0557

   Is it common to have a two-hour old altimeter? (29.51 was reported
   at 0350).  By back of the envelope that would give an altitude
   error of about 150-200 ft.

Further, the ridge is ~850 feet higher than the field and 3 miles west.
Winds were from 160, and the ridge centerline is roughly 190-010

As a glider pilot fond of ridge soaring, my thoughts go immediately to the
ridge wave.  On such a violent night, the ridge wave on the downwind side
might have been 2000 fpm downdraft extending out 1/2 mile from the ridge
(just my guesses).  I could even visualize turbulent eddies or rotor clouds
several miles downwind.  Wadda you jet jockeys say?  Anything here out of
the ordinary?