.52 Flashcards
VOR TACAN: Polarization tolerance
<= 2.0 degrees
VOR: Receiver Checkpoint tolerance 1 Ground 2 Airborne
Ground 15 microvolts, +- 2.0 degrees
Airborne +- 1.5 degrees
VOR TACAN: Roughness tolerance
3.0 degrees
VOR TACAN: Scalloping tolerance
3.5 degrees
VORTAC: service volume Hi
1000 to14499: 40nm
14500 to 17999: 100nm
18000 to 45000: 130nm
45001 to 60000: 100nm
Rho Theta Coverage Orbit
- terminal
- low
- hi
terminal-25 nm
low -40 nm
hi-40nm
1000’(2000’ mountainous) over antennae, terrain, and obstructions
VOR Modulation Tolerance
- AM
- FM
- 9600
AM: 25-35%
FM: 14.8-17.2 deviation ratio
9600: 20-35% w/voice, 20-55% without voice
TACAN Modulation Tolerance
10-30%
VORTAC Service Volume
- Low
- Terminal
Terminal: 1000’-12,000’ @ 25 nm
Low: 1000’-18000’ @ 40 nm
Signal Strength Tolerance
- VOR
- TACAN
VOR: >=5 microvolts or -93dbm
TACAN: 80 dbm (whatever the fuck that is)
DME tolerance
+- .2 nm, no unlock
Rho Theta ARR
-Periodic Alignment tolerance
> 1 degree from previously established, perform alignment orbit.
If alignment orbit >1 degree, contact mx
VOR offsets are checked by flying…
5 degrees both sides
FAF altitude to 100 below mins
Rho Theta
- ARR establishment
- Alignment Orbit establishment
ARR: 5-10 nm segment, 5-25 DME hybrid mode (10-25 DME mode)
Alignment Orbit: 5 nm minimum hybrid (10 nm DME)
How do you fly a TACAN Null check?
3 miles before and after FAF at FAF altitude,
plus offset 5 degrees both sides
RNAV
Ensure full fly up indication on _____ approaches.
WAAS
RNAV
What’s the minimum segment to be flown on RNAV approaches?
2 miles prior to FAF to MAP
RNAV
-CRC remainder
Perfect match, No CRC remainder
RNAV
-Glide path alignment tolerance
+-.1 degrees
RNAV
-Course Alignment tolerance
+-.1 degrees of true course
RNAV
-Threshold Crossing Height tolerance
+12’
-10’
Don’t forget to check for pending data and VGSI coincidence!
RNAV
When checking ODP/SID:
If low close end obstacles, cross departure end of runway at…
200’
RNAV
HPL tolerances
-LP/LPV
-WAAS
<=40 m LP/LPV
<=556 m WAAS
RNAV
VPL tolerances
-LPV
-WAAS
<=35m, <=50 for approach mins 250’ or greater (LPV)
<=50, (WAAS)
RNAV
-Fly one dot below for approaches that have only ___ minima
LNAV or LP
VGSI
-Effective Glide Path Angle tolerance
+-.2 degrees
VGSI
-Visual and electronic glideslopes must coincide in the area between ….
6000-1000’ from threshold
…Height group 4 coincidence 300-350’
VGSI
-Coverage and Obstacle Clearance is measured…
10 degrees either side of centerline and 4 miles out when checking coverage
VGSIs are aligned to provide at least __ above obstacles
1 degree
Lights Visual Glide Path
-What are the intensity settings?
100% day
30% twilight
10% dark
VGSI
-When obstacles can’t be removed, what the hell are you supposed to do?
Raise glidepath angle
displace the system further from threshold
baffle the fuckers
VGSI
-Check this on a surveillance inspection
ID and contrast Distinct color transitions Correct sequence Flyability Coincidence Obstructions PCL Circling considerations
VGSI
- PAPI inspection preferred method to calculate angle
- VASI inspection preferred method to calculate angle
Level Run- PAPI
On Path- VASI (start 5 miles at 1000 AGL, stay on glide path)
VGSI
- Ensure obstruction clearance evaluated from __ to threshold
- When usable distance is restricted, safety buffer of at least __ inside obstacle penetration
8 nm
.5 nm (e.g. when you NOTAM out a VGSI for an obstacle 3 miles from threshold, put the restriction at 2.5 nm)
Approach and Runway Lights
-These require night evaluations for 1st time evaluation
REIL Check intensity (no color, uniform) and alignment (+-1500', 2.5 degrees or higher, no glare)
Approach and Runway Lights
-Check these 4 things on lights
Intensity
Alignment
Inop Lights
For touchdown and centerline lighting (periodic) make sure no more than 10% are out, 4 or less consecutive centerline, and touchdown zone doesn’t have 2 same side bars out
NDB What's the service volume for -compass locator -MH -H -HH
Coverage Compass locator: 15nm (10 w/ voice) MH: 25 (16.7 w/ voice) H: 50 (33.3 w/ voice) HH: 75 (50 w/ voice)
NDB
- Max bearing deviation
- Max bearing deviation during approach
+-10 degrees (out of tolerance okay for 8 sec)
+-5 degrees (out of tolerance okay for 4 sec)
OT conditions cant look like station passage and generally not one sided when repetitive
NDB
- Altitude coverage orbit
- Max speed coverage orbit
- 1500’ above facility or 1000’ (2k mountainous) above terrain/obstacles
- 250 knots
If you perform a commissioning inspection on an ILS prior to the completion of runway construction, can you call it complete?
Maybe. A special flight inspection should be performed after completion of the runway work and before the facility is placed into service, specifying the items needing inspection. If the remaining runway work is negligible and no special is required, the condition must be documented on the DFL.
You’re scheduled to inspect the new IRW VOR system. The equipment replaced is the same type and config as the former and located at the same physical site, including antenna location. What type of check is required and which checklist will you run?
Required items for an antenna change in each chapter must be accomplished as a minimum. Additional requirements of such a check will be determined b flight inspector and facilities mx.
If a different antenna type is installed on an existing facility, is the inspection considered Antenna Change or Reconfig?
Antenna changes to different type are Reconfiguration Inspections
What is required if an out of tolerance or unsat condition is found during a surveillance inspection?
DFL entry, report, and if necessary NOTAM