For privacy reasons YouTube needs your permission to be loaded.
I Accept

Webinar 13 Q&A

Q1Different between lights serviceability and photometric performance serviceability level and limitation?

Mohammed Al Amri
The presentation will briefly explain this. However, ICAO servceability level for an individual light is 50% of design. For maintenance, we use 70% of design as the baseline % when we commence maintenance on an individual light fixture. However, some airports, including Muscat adopt a higher level of light output ( eg. 80% of design) as their % level when maintenance commences. Please note these %’s are based upon a light fixture ( eg. Runway centreline whose iso-candela output need is 5000 candela) at 6.6 amps hence deemed as 100% @ 6.6 amp. This means that this centreline light is unserviceable when its light output falls to 2500 cd.Keith
Q2Will I be able to get the info on PDF. I connected late, I miss out at the start.

Roderick Fisher
A copy of webinar will be posted on website.Robert
Q3Few Questions:

Vineet Nagia
Questions are welcomed and we will answer them either during the presentation, in the Q&A session afterwards BUT all will be posted on the TMS Training Solutions website over the next few days!Keith
Q41. You mentioned you do not open filttings in the field : what about alignment of edge lights and fused lamps in edge lights?

Vineet Nagia

The general policy for AGL maintenance is that inset (in-pavement) lights needing maintenance are exchanged “1 for 1” in the field and servicing is done in the workshop whereby for elevated lights, where possible, we maintain these in the field. Such aspects as elevated light alignment & external cleaning is clearly a field maintenance function. eg. for Tungsten Halogen powered fittings … lamp changes are done in the field!Keith
Q52. How long do you get the runway/ taxiway for maintenance typically?

Vineet Nagia
“How long is a piece of string” … ALL airfields are different. Traffic Density is an issue; 24/7 operations are an issue etc. HENCE, it is important to manage operational maintnenance (ie. breakdown maintenance & preventive maintenance) in a structured way such that records are available and that competent staff availability & tools are ready when needed. Perhaps a simple 1 to 1 change of one runway inset light, assuming no practical issues being experienced, will need an allocated time of around 30 minutes minimum ie. mobilisation, safety features carried out; task conducted including live check for security, serviceability, FOD check, departure and handover back to operations.Keith
Q63. Is there a way to increase the cable life of old cable in the field without replacing it?

Vineet Nagia
Sadly, NO! Deterioration of cable, specifically Primary cable, due to the environment will progressively deteriorate. Regular checks electrically (eg. Insulation and continuity resistance checks) will assist in determining the quality of the cable. Initial choice of cable (screened or unscreened cable) + installation criteria (eg. direct buried or in ducts) can also affect life expectancy!Keith
Q74. If you use different manufacturer's fittings then how do you account and keep track of the torque for each particular inset?

Thanks Keith!

Vineet Nagia
If you have a modern electronic torque wrench specifically designed & calibrated for AGL use … then the manufacturer’s data can be put into the torque wrench software HENCE eliminates the potential for incorrect torque setting issues. For a mechanical torque wrench you need to practically & personally ensure that the correct torques is applied according to the product data sheets!Keith
Q85. What do you do if the sign face is broken?

Vineet Nagia
Firstly ensure that NO FOD is present! Investigate whether, you can replace immediately. Advise ATC and Operations of the problem. If rectification cannot be undertaken immediately, then we have a NOTAM (Notice to Airmen) system in place which informs everyone & identifies that the sign in non-compliant. We are then normally allocated a timeframe to ensure rectification is completed in due time.Keith
Q95A. What I meant is if the sign face is broken is there a capability to make that with the right lettering/ spacing/ colours etc as per the standards? Or is each kind of sign face already kept as a spare?

Vineet Nagia
Generally, an airport does not hold complete replacements of Guidance Sign Legends/Facia. In the event of such an occurance then you will need to re-order from the manufacturer. However, this means a delay in returning to serviceability hence ATC & Operations should be notified immediately and there should be an announcement in the form of a NOTAM that the sign at that location is defective. If it affects Ground Traffic Management (GTM) and specifically for LVP conditions or night operations then a "follow-me-vehicle" needs to be on standby for assistance.Keith
Q106. How often do you renew the training or is it only done once for one person?

Vineet Nagia
The is no specific period notified by our Standards bodies as to the periodicity to undertake refressher training. However, guidelines in other "engineering disciplins" suggest a minimum period of approximately 3 years is appropriate. For new guidance on AGL training(s) under the Competency Based training & Assessment (CBTA) umbrella all AGL engineering preactitioners, we are looking to define refresher training within a 'Continuation Training" Phase of a minimum of 3 years plus a maximum of 5 years or sooner if new technologies or equipments are introduced.Keith
Q11Good Day Keith

Roderick Fisher
Hi Rod … Hope all is well with you during these difficult times!Keith
Q12What is the application of Narrow beam and Wide beam TWY C/L Light or Stop bar lightsThere are 3 intensity levels for taxiway lights; Medium intensity, for operations in moderate or good visibilities at night, High intensity, for operations in poor visibilities by day and at night, Very high intensity, for daytime operations in good visibilities when the taxiway lights form part of an A-SMGCS installation.

There are 8 horizontal beam types; The Strait/ narrow, Strait/ wide (for locations, such as the approach to an apron, where the pilot may be require to offset the aircraft from the centre-line to carry out the turn) and Curve/ to-ed in. These 3 types are required in low visibility conditions (< 300 m). Similarly there are 3 types of Very high intensity lights for A-SMGCS. For operations in visibilities> 300 m a Strait and a Curve fitting are specified.
Q13Dear keith, CAT II serviceability is 95%, as so CAT I is 85%, what about non precision RWY?

Mohammad Ghashghaei
ICAO only specifies serviceability levels for precision approaches. However bearing in mind that the cues a pilot needs at the end of the approach and during the flare, landing and roll out are similar in Category 1 , non-precision and non-instrument approaches an 85% serviceability level would seem appropriate.Tony
Q14Our load shedding starts at 4pm SA time. I'm not happy with it.

Good to hear from you.

Our grid will be cut off 4pm SA time. Here it is a problem. 4pm SA time. The network is affected.

Roderick Fisher

Hi Rod … YES. Load sharing can be quite a challenge. I have experienced that many times during visits to J'Burg. However, and thankfully, emergency power is available in OR Tambo and the accomodation hotels have their own power backup! Keep well, keep safe!Keith
Q15Hi Robert,

Last week webinar presentation and recorded video is available in TMS website.
Last week's Webinar presentation and recording will be uploaded to the website within the next couple of days.Felicity
Q16GDay Steve,

Good presentation. What do you do different with maintenance during the Summer months vs Winter months. Frequency of certain maintenance activities change? What about yoru engineers working in Summer months and high temperatures?

Wayne Rolfe
No difference during the summer than winter apart from access due to the runway for nights works like infield measurements. Winter Team has longer access to conduct these inspections over the summer months. Summer months works on airfield not happen much between 10am to 3pm as hotest part of the day. Workshop maintenance is completed. If required for reason Team are on the RWYSteve
Q17What are the steps adherening in Oman, Australia to avoid water entry/stagnation inside transformer housing pits?Its prefer pits are water tight, Australia generally a factory moulded plug leads are used and heatshrink on to the primary cable, ensuring a water tight sealSteve
Q18Is there any IP address changes in your website? we couldn't able to see your presentation.!!Many apologies, our website was unavailable earlier. Unfortunately there was a temporary system problem caused by our hosting company. This issue has now been resolved and the website is running as normal.Felicity
Q19Thanks for answer and Steve for the useful presentation

Mohammed Al Amri
Thank you! We're glad that you've found the Webinar useful.Felicity
Q20Big like keith, i can can help you to do more for documents

Mohammad Ghashghaei
Q21If Fitting and shallow base does belongs to different manufacturer then which manufacturer torque should be followedGenerally, if you use a fitting from one manufacturer and the shallow base/can from another, then you run the risk, & will need to accept liability, if problems are experienced. Should a bolt/screw become loose then it is important to understand that the matching female thread in the base unit is designed to accept the manufacturers recommended bolt/screw. Hence the bolt torque setting is matched to the base unit!Keith
Q22What is font we need to follow alphabets (taxiway name) in sign boards facia. eg. Arial, Times new roman, calbre etc..

Sudheer N
The font for sign inscriptions is specified in Annex 14 APP 3-2 to APP 3 –6. This font is based on a well-known font such as Helvitica. The actual font used is not recorded by ICAOTony
Q23We are writing a document for competency requierments and licensing of AGL personnel in Iran and i think it will finish in two months. i will send it to you

Mohammad Ghashghaei
Contact me on cc. to me on I have new AGL CBTA proposals we can share & collectively determine both Competency Based Training (CBT) and the Assessment (A) criteria >>>> CBTA !Keith

Offering a new generation of training

From practical application training for airfield electricians through to consultants, designers, project personnel and installation contractors including dedicated seminars and workshops for national aviation authority inspectors and airport operations staff.