PRECISE FLIGHT, INC.
Amendment 39-11434Docket No. 98-CE-87-AD
Issued November 15, 1999.
Applicability: Model SVS III standby vacuum systems, installed on, but not limited to, the aircraft listed in
the following chart. These systems can be installed either in accordance with the applicable supplemental
type certificate (STC) or through field approval:
Affected STC Make and Model Airplanes
SA2160NM Raytheon Beech Models 23, A23, A23A, A23-19, 19A, B19,
B19A, A23-24, B23, C23, A24, A24R, B24R, C24R, 35, A35,
B35, C35, D35, E35, F35, G35, 35R, H35, J35, K35, M35,
N35, P35, S35, V35, V35A, V35B, 35-33, 35-A33, 35-B33,
35-C33, 35-C33A, E33, E33A, E33C, F33, F33A, F33C, G33,
36, A36, A36TC, B36TC, 4S(YT-34), A45(T-34A, B-45),
D45(T-34B), and 77 Series
SA2161NM Raytheon Beech Model V35B
150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, A150L,
150M, 152, A152, A150K, A150M, 170, 170A, 170B, 172,
172A, 172B, 172C, 172D, 172E, 172F (USAFT-41A), 172G,
172H(USAFT-41A), 172I, 172K, 172L, 172M, 172N, 172P,
172Q, 175, 175A, 175B, 175C, P172D, R172E (USAFT-41B,
USAFT41-3, and USAFT-41D), R172F (USAFT-41D and
USAFT-41C), R172G (USAFT-41D), R172H (USAFT-41D), R172J,
R172K, 172RG, 177, 177A, 177B, 177RG, 180, 180A, 180B,
180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182,
182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J,
182K, 182L, 182M, 182N, 182P, 182Q, 182R, 182RG, T182,
T182RG, T182R, 185, 185A, 185B, 185C, 185D, 185E, A185E,
A185F, 188, 188A, 188B, A188, A188B, T188C, 206, P206,
P206A, P206B, P206C, P206D, P206E, TP206A, TP206B,
TP206C, TP206D. TP206E, U206-A, U206-B, U206-C, U206-D,
U206-E, U206-F, U206G, TU206-A, TU206-B, TU206-C,
TU206-D, TU206-E, TU206-F, TU206-G, 207, 207A, T207,
T207A, 210, 210A, 210B, 210C, 210D, 210E, 210F, 210-5
(205), 210-5A (205A), T210F, 210G, T-210G, 210H, T-210H,
210J, 205P, T-210J, 210K, T-210K, T210L, 210L, 210M,
T210M, 210N, P210N, T210N, 205T, 210R, P210R, 205U,
T210R, 210-5, 210-5A, 305A (USAF 0-1A), 305C (USAF 0-1E),
305D (USAF 0-1F), 305F, 305B (USAF T0-1D), 305E (0-1D or
0-1F), and 321 (Navy 0E-2)
PA-12S, PA-14, PA-15, PA-16, PA-16S, PA-17, PA-18,
PA-18A, PA-18S, PA-18-105 (Special), PA-18S-105(SP),
PA-18-125 (Army L-21A), PA-18AS-125, PA-18S-125,
PA-18-135, PA-18A-135, PA-18AS-135, PA-18S-135,
PA-18-150, PA-18A-150, PA-18AS-150, PA-18S-150, PA-19
(Army L-18C), PA-19S, PA-20, PA-20S, PA-20-115,
PA-20S-115, PA-20-135, PA-22, PA-22-108, PA-22-135,
PA-22S-135, PA-22-150, PA-22S-150, PA-22-160, PA-22S-160,
PA-24, PA-24-250, PA-24-260, PA-24-400, PA-25, PA-25-235,
PA-25-260, PA-32-260, PA-32RT-300, PA-32RT-301T,
PA-32-300, PA-32RT-300T, PA-32-301, PA-32S-300,
PA-32R-301, PA-32-301T, PA-32R-300, PA-32R-301T,
PA-28-140, PA-28-141, PA-28-150, PA-28-151, PA-28-160,
PA-28S-160, PA-28-180, PA-28R-180, PA-28S-180, PA-28-235,
PA-28S-235, PA-28-181, PA-28-161, PA-28R-200, PA-28R-201,
PA-28R-201T, PA-28-236, PA-28RT-201, PA-28RT-201T,
PA-28-201T, PA-36-285, PA-36-300, PA-36-375, PA-38-112,
M20G, M20J, M20K, M20M, and M22
Aerodifusion, S.L. Model Jodel D-1190S
Aeromere, S.A. Model Falco F.8.L.
Aeronautica Macchi S.P.A. Models AL60, AL60-B, AL60-F5,
Aeronautica Macchi & Aerfer Model AM-3
Aeronca Inc. Models 15AC and S15AC
Aerospatiale Model TB20 Trinidad
Arctic Aircraft Co., Inc. Models S-1A, S-1A-65F,
S-1A-85F, S-1A-90F, S-1B1(Army L-67 XL-6), and S-1B2
Avions Mudry et Cie Model CAP 10B
American Champion Models (Bellanca, Aeronca) 7AC, 7ACA,
S7AC (L-16A), 7BCM (L-16B), 7CCM, 7DC, S7DC, 7EC, S7EC,
7ECA, 7FC, 7GC, 7GCA, 7GCCA, 7GCB, 7GCBA, 7GCBC, 7HC,
7JC, 7KC, 7KCAB, 8KCAB, 8GCBC, 11AC, S11AC, 11BC, S11BC,
11CC, and S11CC Bellanca Aircraft Corporation Models
14-9, 14-9L, 14-12F-3, 14-13, 14-13-2, 14-13-3, 14-13-3W,
14-19, 14-19-2, 14-19-3A, 17-30, 17-31, 17-31TC, 17-30A,
17-31A, and 17-31ATC
Biemond, C. Model Teal CB1
Board, G.R. Models Columbia XJL-1 and
Clark Aircraft, Inc. Models 12 and 1000
Falcon Aircraft Corporation Model F-1
Flug und Fahrzeugwerke AG Model AS 202/15 "Brand"
Found Brothers Model FBA-2C
Fuji Heavy Industries Models FA-200-160, FA-200-180, and
Funk Aircraft Model Funk C
Kearns, Edward Scott (Garcia, Henry S.) Model (Emigh)
Swift Museum Foundation, Inc. Model (Globe) GC-1A, GC-1B
Goodyear Aircraft Model GA-22A
Great Lakes Aircraft Model 2T-1A-1 and 2T-1A-2 Grumman
American Models G-164, G-164A, G-164B, AA-1, AA-1A,
AA-1B, AA-1C, AA-5, AA-5A, and AA-5B
Commander Aircraft (Gulfstream) Models 112, (112A, 112B,
112TC, 112TCA, 114, and 114A
Helio Enterprises Models H-250, H-295 (USAF U-10D),H-391
(USAF YL-24), H-395 (SAF L-28A), H-395A, HT-295, and
Prop-Jets, Inc. (Interceptor Corp., Aero Commander,
Meyers) Models 200, 200A, 200B, 200C, and 200D
C. Itoh Aircraft Maintenance & Engineering Co. LTD. Model
Jamieson Corporation Model J-2-L1B
Jodel, Avion Models D-140-B, DR-1050, D-1190, and 150
Lake Models C-1, C-2-IV, LA-4, LA-4-200, and LA-4-250
Luscombe Aircraft Corp. Models 8, 8A, 8B, 8C, 8D, 8E, 8F,
T-8F, and 11A
Maule Aerospace Technology Corp. Models Bee Dee M-4, M-4,
M-4C, M-4S, M-4T, M-4-180C, M-4-180S, M-4-210, M-4-201C,
M-4-210S, M-4-210T, M-4-220S, M-4-220T, M-5-180C,
M-5-200, M-5-210C, M-5-210TC, M-T-220C, M-5-235,
M-5-235C, M-6-180, M-6-235, M-7-235, MX-7-180, MX-7-235
Messerschmitt-Bolkow Models BO-209-150 FV&RV, BO209-160
FV&RV, BO-209, and 150OFF
Nardi S.A. Model FN-333
Jimmie Thompson Enterprise (Navion Rangemaster Aircraft
Corporation) Models Navion (L-17A)
Navion A (L-17B, L-17C), Navion B, D, E, F, G, and H
White International Ltd. Models (Pitts) S-1S, S-1T, S-2,
Procaer S.P.A. Models F 15/B, F 15/C, and F 15/E
Gulfstream Aerospace Corporation (Rockwell) Models 111,
112, 112B, 112TC, 112TCA, and 114
Aermacchi S.p.A Models S.205, S.205-18F, S.205-18/R,
S.205-20/F, S.205-20/R, S.205-22/R, S.208, S.208A, F.260,
Socata - Groupe Aerospatiale Models Rallye Series MS880B,
MS885, MS892-A-150, MS892E-150, MS893A, MS893E, MS894A,
MS894E, TB9,TB10, and TB21
Stinson Models 108-2 and108-3
Sud Aviation Models Gardan GY.80-1500, GY.80-160, and
Taylorcraft Aircraft Company Models F19, F21, and F21A
Univair Aircraft Corporation (Forney) Models F-1, F-1A,
(ERCO)E, 415D, (ALON)A-2, A20a, (Mooney)M10, (Mooney)
(ERCO) 415-C, and 415-CD
Augustair, Inc. (Varga Aircraft Corporation) Models 2150,
2150A, and 2180
NOTE 1: The above list includes the aircraft where the Precise Flight, Inc. Model SVS III standby vacuum
systems could be installed through STC. This list is not meant to be exhaustive nor does it include all
aircraft with the systems installed through field approval.
NOTE 2: This AD applies to any aircraft with a standby vacuum system installed that is identified in the
preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the
area subject to the requirements of this AD. For aircraft that have been modified, altered, or repaired so
that the performance of the requirements of this AD is affected, the owner/operator must request approval
for an alternative method of compliance in accordance with paragraph (e) of this AD. The request should
include an assessment of the effect of the modification, alteration, or repair on the unsafe condition
addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include
specific proposed actions to address it.
Compliance: Required as indicated in the body of this AD, unless already accomplished.
To detect and correct problems with the standby vacuum system before failure or malfunction and to
provide operating procedures for the pilot regarding the use and limitations of this system, accomplish the
(a) Within the next 30 calendar days after the effective date of this AD, accomplish whichever
(paragraph (a)(1) or (a)(2) below) of the following that applies:
(1) For airplanes with the affected standby vacuum system installed in accordance with the
applicable STC, incorporate the applicable Precise Flight, Inc. Airplane Flight Manual
Supplement (AFMS) for Standby Vacuum Systems (each document corresponds with the
applicable STC as presented in the chart below) into the Airplane Flight Manual (AFM),
including installing all placards specified in these AFMS's; or insert a copy of the Appendix to
this AD into the AFM, including installing all placards specified in the Appendix:
Applicable STC AFMS Date
SA2160NM May 7, 1998
SA2161NM August 6, 1998
SA2162NM August 6, 1998
SA2163NM August 6, 1998
SA2164NM August 6, 1998
SA2166M August 6, 1998
SA2167NM August 6, 1998
SA2168NM August 6, 1998
SA2683NM August 6, 1998; or
(2) For airplanes with the affected standby vacuum system installed through field approval, insert
the Appendix to this AD into the AFM, including installing all placards specified in the
(b) Within the next 12 calendar months after the effective date of this AD, and thereafter at intervals
specified in the following paragraphs, inspect the push-pull cable, vacuum lines, saddle fittings,
and shuttle valve for correct installation and damage (wear, chafing, deterioration, etc.).
Accomplish these inspections in accordance with Precise Flight Instructions for Continued
Airworthiness (Section 3.3 of Installation Report No. 50050), Revision 25, dated August 26,
(1) Reinspect the push-pull cable, vacuum lines, and saddle fittings at intervals not to exceed 12
calendar months; and
(2) Reinspect the shuttle valve at intervals not to exceed 24 calendar months.
(c) Prior to further flight after each inspection required by paragraph (b) of this AD, accomplish the
following in accordance with Precise Flight Instructions for Continued Airworthiness (Section 3.3
of Installation Report No. 50050), Revision 25, dated August 26, 1996.
(1) Correct any discrepancy found; and
(2) Conduct a function test of the vacuum system and assure proper function.
(d) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the
Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location
where the requirements of this AD can be accomplished.
(e) An alternative method of compliance or adjustment of the initial or repetitive compliance times
that provides an equivalent level of safety may be approved by the Manager, Seattle Aircraft
Certification Office (ACO), 1601 Lind Avenue, SW, Renton, Washington 98055-4065. The
request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add
comments and then send it to the Manager, Seattle ACO.
NOTE 3: Information concerning the existence of approved alternative methods of compliance with this
AD, if any, may be obtained from the Seattle ACO.
(f) The inspections, corrections, and test required by this AD shall be done in accordance with
Precise Flight Instructions for Continued Airworthiness (Section 3.3 of Installation Report No.
50050), Revision 25, dated August 26, 1996. This incorporation by reference was approved by
the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.
Copies may be obtained from Precise Flight, Inc., 63120 Powell Butte Road, Bend, Oregon
97701. Copies may be inspected at the FAA, Central Region, Office of the Regional Counsel,
901 Locust, Room 506, Kansas City, Missouri 64106, or at the Office of the Federal Register,
800 North Capitol Street, NW, suite 700, Washington, DC.
(g) This amendment becomes effective on January 14, 2000.
APPENDIX TO AD 99-24-10
PRECISE FLIGHT, INC.
AFMS for STANDBY VACUUM SYSTEM
A Precise Flight Standby Vacuum System may be installed to provide a temporary vacuum system in the
event of a primary vacuum failure. The Standby Vacuum System operates on the differential between the
intake manifold and ambient air pressure and is directed through a shuttle valve system to drive your flight
I. OPERATING LIMITATIONS
1. The Standby Vacuum System is for emergency or standby use only and not for dispatch
2. Vacuum powered and/or Vacuum gyro directed autopilot operation may be unreliable
when the Standby Vacuum System is the sole source of vacuum. Vacuum powered or
vacuum gyro directed autopilot should be OFF when operating with a failed primary
3. The Supplemental Vacuum System is not designed to operate pneumatic de-ice
systems. DO NOT operate a pneumatic de-ice system when operating with a failed
primary vacuum system.
4. Above 10,000 ft. pressure altitude, engine power settings may have to be significant1y
reduced to provide adequate vacuum power for proper gyro instrument operation.
5. The following placards are required to be in full view of pilot:
One of the following placards must be placed in full view of the pilot near the instrument vacuum
indicator after appropriate entries have been made.
Approximate Standby Vacuum Available - Altitude - Power Chart for aircraft with Constant Speed
Propeller - Maximum Continuous RPM.
PRESS MAN. SVS VACUUM
ALT. (FT.) RPM PRESSURE IN. HG MIN.
2000 Max. Cont.
4000 Max. Cont.
6000 Max. Cont.
8000 Max. Cont.
10.000 Max. Cont.
Approximate Standby Vacuum Available - Altitude - Power Chart for aircraft with a Fixed Pitch
PRESS SVS VACUUM
ALT. (FT.) RPM IN. HG MIN.
II. OPERATING PROCEDURES
A. NORMAL PROCEDURES
1. GROUND CHECK
a. Cycle the Standby Vacuum Control Knob OUT - ON -, and return Control Knob IN -
OFF - position.
2. BEFORE TAKEOFF
a. Idle Engine at low speed, momentarily pull the standby vacuum knob out - ON - and
check vacuum gauge. Normally, the vacuum reading will be slightly higher. After
checking system push Standby Vacuum System knob IN - OFF -. Check that vacuum
gauge has returned to the previous reading.
a. Regularly check vacuum gauge and monitor warning light for proper vacuum system
B. EMERGENCY PROCEDURES
1. PRIMARY VACUUM FAILURE WARNING LIGHT ILLUMINATES
a. Pull the Standby Vacuum System knob OUT -ON- and adjust throttle setting as
required to maintain adequate vacuum for the primary instruments - Suction Gauge
Reading in the Green Arc - If necessary descend to a lower altitude to obtain a larger
differential between manifold and ambient pressure. Vacuum power must be closely
monitored by checking the vacuum gauge frequently.
b. The SVS is not designed for continued IFR flight. Immediate steps should be taken to
return to VFR conditions or to land. If this is not possible, IFR flight should be
continued only as long as necessary to return to VFR conditions or land the airplane.
WARNING: FAILURE OF THE VACUUM SYSTEM STILL CONSTITUTES AN
EMERGENCY SITUATION REGARDLESS OF THE INSTALLATION OF THE SVS. IT
MAY NOT BE POSSIBLE TO MAINTAIN A SAFE ALTITUDE AND MAKE USE OF THE
SVS. IN SUCH A SITUATION THE AIRPLANE MUST BE FLOWN USING
NON-VACUUM POWERED INSTRUMENTS.
c. If descent is impractical:
0 Periodically and temporarily reduce power as
required to provide adequate vacuum to the aircraft
0 Reapply power as required, while comparing vacuum
driven gyros against the Turn and Bank Indicator,
Turn Coordinator, VSI and/or other flight
0 When an obvious discrepancy is noted between the
vacuum driven instruments and other flight
instrumentation. Periodically and temporarily
reduce power as required to provide adequate vacuum
to the aircraft primary instruments.
FOR FURTHER INFORMATION CONTACT:
Ms. Dorothy Lundy, Aerospace Engineer, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue,
SW, Renton, Washington 98055-4065; telephone: (425) 227-2260; facsimile: (425) 227-1181.